SO18 postcode district: Southampton and around

SO18 is a postcode district in England, with 940 postcodes in use in 7 sectors. It has postcodes in Southampton and West End. It is split between 2 councils: Southampton (848 postcodes) and Eastleigh (92). 92 of its 940 postcodes are in Hampshire. ONS lists no county for the other 848.

Postcodes in use
940
Sectors
7
Councils
2 councils
Places
2 places

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in SO18, by flood risk

Map of every postcode in SO18, by flood risk Of the 940 postcodes in SO18 that ONS places, 29 have a home or business at high risk, 6 are at medium risk at worst, 22 are at low risk at worst, 1 are at very low risk only and 882 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 6 postcodes at high or medium risk. Places named: Southampton, West End. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. M27A335A33 SO18 1AE: not on the flood risk listSO18 1AF: not on the flood risk listSO18 1AG: not on the flood risk listSO18 1AH: not on the flood risk listSO18 1AJ: not on the flood risk listSO18 1AN: not on the flood risk listSO18 1AP: not on the flood risk listSO18 1AQ: not on the flood risk listSO18 1AR: not on the flood risk listSO18 1AS: not on the flood risk listSO18 1AU: not on the flood risk listSO18 1AZ: not on the flood risk listSO18 1BE: not on the flood risk listSO18 1BF: not on the flood risk listSO18 1BG: not on the flood risk listSO18 1BJ: not on the flood risk listSO18 1BL: not on the flood risk listSO18 1BN: not on the flood risk listSO18 1BP: not on the flood risk listSO18 1BQ: not on the flood risk listSO18 1BT: not on the flood risk listSO18 1BU: not on the flood risk listSO18 1DL: not on the flood risk listSO18 1DN: not on the flood risk listSO18 1DR: not on the flood risk listSO18 1DS: not on the flood risk listSO18 1DW: not on the flood risk listSO18 1DX: not on the flood risk listSO18 1DY: not on the flood risk listSO18 1DZ: not on the flood risk listSO18 1EE: not on the flood risk listSO18 1EH: not on the flood risk listSO18 1EJ: not on the flood risk listSO18 1EL: not on the flood risk listSO18 1EN: not on the flood risk listSO18 1EP: not on the flood risk listSO18 1EQ: not on the flood risk listSO18 1ES: not on the flood risk listSO18 1FG: not on the flood risk listSO18 1FP: not on the flood risk listSO18 1FQ: not on the flood risk listSO18 1FS: not on the flood risk listSO18 1FT: not on the flood risk listSO18 1FU: not on the flood risk listSO18 1FW: not on the flood risk listSO18 1FX: not on the flood risk listSO18 1FZ: not on the flood risk listSO18 1GA: not on the flood risk listSO18 1GF: not on the flood risk listSO18 1GJ: not on the flood risk listSO18 1GL: not on the flood risk listSO18 1GN: not on the flood risk listSO18 1GQ: not on the flood risk listSO18 1GR: not on the flood risk listSO18 1GS: not on the flood risk listSO18 1HA: not on the flood risk listSO18 1HG: not on the flood risk listSO18 1HH: not on the flood risk listSO18 1HJ: not on the flood risk listSO18 1HN: not on the flood risk listSO18 1HT: not on the flood risk listSO18 1HZ: not on the flood risk listSO18 1JA: not on the flood risk listSO18 1JB: not on the flood risk listSO18 1JD: not on the flood risk listSO18 1JE: not on the flood risk listSO18 1JF: not on the flood risk listSO18 1JG: not on the flood risk listSO18 1JH: not on the flood risk listSO18 1JJ: not on the flood risk listSO18 1JL: not on the flood risk listSO18 1JN: not on the flood risk listSO18 1JP: not on the flood risk listSO18 1JQ: not on the flood risk listSO18 1JS: not on the flood risk listSO18 1JT: not on the flood risk listSO18 1JW: not on the flood risk listSO18 1JX: not on the flood risk listSO18 1JY: not on the flood risk listSO18 1JZ: not on the flood risk listSO18 1LA: not on the flood risk listSO18 1LB: not on the flood risk listSO18 1LD: not on the flood risk listSO18 1LF: not on the flood risk listSO18 1LG: not on the flood risk listSO18 1LH: not on the flood risk listSO18 1LJ: not on the flood risk listSO18 1LL: not on the flood risk listSO18 1LN: not on the flood risk listSO18 1LP: not on the flood risk listSO18 1LQ: not on the flood risk listSO18 1LR: not on the flood risk listSO18 1LS: not on the flood risk listSO18 1LT: not on the flood risk listSO18 1LU: not on the flood risk listSO18 1LW: not on the flood risk listSO18 1LX: not on the flood risk listSO18 1LY: not on the flood risk listSO18 1LZ: not on the flood risk listSO18 1NA: not on the flood risk listSO18 1NB: not on the flood risk listSO18 1ND: not on the flood risk listSO18 1NF: not on the flood risk listSO18 1NG: not on the flood risk listSO18 1NH: not on the flood risk listSO18 1NJ: not on the flood risk listSO18 1NL: not on the flood risk listSO18 1NN: not on the flood risk listSO18 1NP: not on the flood risk listSO18 1NR: not on the flood risk listSO18 1NS: not on the flood risk listSO18 1NT: not on the flood risk listSO18 1NU: not on the flood risk listSO18 1NW: not on the flood risk listSO18 1NY: not on the flood risk listSO18 1NZ: not on the flood risk listSO18 1PA: not on the flood risk listSO18 1PB: not on the flood risk listSO18 1PD: not on the flood risk listSO18 1PF: not on the flood risk listSO18 1PG: not on the flood risk listSO18 1PH: not on the flood risk listSO18 1PJ: not on the flood risk listSO18 1PL: not on the flood risk listSO18 1PN: not on the flood risk listSO18 1PQ: not on the flood risk listSO18 1QA: not on the flood risk listSO18 1QB: not on the flood risk listSO18 1QD: not on the flood risk listSO18 1QP: not on the flood risk listSO18 1QQ: not on the flood risk listSO18 1QR: not on the flood risk listSO18 1QS: not on the flood risk listSO18 1QT: not on the flood risk listSO18 1QU: not on the flood risk listSO18 1QW: not on the flood risk listSO18 1QX: not on the flood risk listSO18 1RB: not on the flood risk listSO18 1RD: not on the flood risk listSO18 1TU: not on the flood risk listSO18 1UA: not on the flood risk listSO18 1UE: not on the flood risk listSO18 1UR: not on the flood risk listSO18 2AA: not on the flood risk listSO18 2AB: not on the flood risk listSO18 2AD: not on the flood risk listSO18 2AF: not on the flood risk listSO18 2AH: not on the flood risk listSO18 2AJ: not on the flood risk listSO18 2AL: not on the flood risk listSO18 2AN: not on the flood risk listSO18 2AP: not on the flood risk listSO18 2AQ: not on the flood risk listSO18 2AR: not on the flood risk listSO18 2AS: not on the flood risk listSO18 2AT: not on the flood risk listSO18 2AW: not on the flood risk listSO18 2AX: not on the flood risk listSO18 2AZ: not on the flood risk listSO18 2BA: not on the flood risk listSO18 2BB: not on the flood risk listSO18 2BD: not on the flood risk listSO18 2BE: not on the flood risk listSO18 2BF: not on the flood risk listSO18 2BG: not on the flood risk listSO18 2BH: not on the flood risk listSO18 2BJ: not on the flood risk listSO18 2BL: not on the flood risk listSO18 2BN: not on the flood risk listSO18 2BP: not on the flood risk listSO18 2BQ: not on the flood risk listSO18 2BR: not on the flood risk listSO18 2BS: not on the flood risk listSO18 2BT: not on the flood risk listSO18 2BW: not on the flood risk listSO18 2BX: not on the flood risk listSO18 2BY: not on the flood risk listSO18 2DA: not on the flood risk listSO18 2DB: not on the flood risk listSO18 2DD: not on the flood risk listSO18 2DE: not on the flood risk listSO18 2DF: not on the flood risk listSO18 2DG: not on the flood risk listSO18 2DH: not on the flood risk listSO18 2DJ: not on the flood risk listSO18 2DL: not on the flood risk listSO18 2DQ: not on the flood risk listSO18 2DR: not on the flood risk listSO18 2DS: not on the flood risk listSO18 2DT: not on the flood risk listSO18 2DU: not on the flood risk listSO18 2DW: not on the flood risk listSO18 2DX: not on the flood risk listSO18 2DY: not on the flood risk listSO18 2DZ: not on the flood risk listSO18 2EA: not on the flood risk listSO18 2ED: not on the flood risk listSO18 2EE: not on the flood risk listSO18 2EF: not on the flood risk listSO18 2EG: not on the flood risk listSO18 2EH: not on the flood risk listSO18 2EJ: not on the flood risk listSO18 2EL: not on the flood risk listSO18 2EN: not on the flood risk listSO18 2EP: not on the flood risk listSO18 2EQ: not on the flood risk listSO18 2ET: not on the flood risk listSO18 2EU: not on the flood risk listSO18 2EW: not on the flood risk listSO18 2EY: not on the flood risk listSO18 2EZ: not on the flood risk listSO18 2FA: not on the flood risk listSO18 2FB: not on the flood risk listSO18 2FD: not on the flood risk listSO18 2FE: not on the flood risk listSO18 2FG: not on the flood risk listSO18 2FH: not on the flood risk listSO18 2FL: not on the flood risk listSO18 2FN: not on the flood risk listSO18 2FP: not on the flood risk listSO18 2FQ: not on the flood risk listSO18 2FR: not on the flood risk listSO18 2FY: not on the flood risk listSO18 2FZ: not on the flood risk listSO18 2GA: not on the flood risk listSO18 2GB: not on the flood risk listSO18 2GD: not on the flood risk listSO18 2GE: not on the flood risk listSO18 2GF: not on the flood risk listSO18 2GG: not on the flood risk listSO18 2GH: not on the flood risk listSO18 2GJ: not on the flood risk listSO18 2GL: not on the flood risk listSO18 2GP: not on the flood risk listSO18 2GQ: not on the flood risk listSO18 2GR: not on the flood risk listSO18 2GS: not on the flood risk listSO18 2GT: not on the flood risk listSO18 2GY: not on the flood risk listSO18 2GZ: not on the flood risk listSO18 2HD: not on the flood risk listSO18 2HE: not on the flood risk listSO18 2HF: not on the flood risk listSO18 2HG: not on the flood risk listSO18 2HH: not on the flood risk listSO18 2HJ: not on the flood risk listSO18 2HL: not on the flood risk listSO18 2HN: not on the flood risk listSO18 2HQ: not on the flood risk listSO18 2HR: not on the flood risk listSO18 2HS: not on the flood risk listSO18 2HT: not on the flood risk listSO18 2HU: not on the flood risk listSO18 2HW: not on the flood risk listSO18 2HX: not on the flood risk listSO18 2HY: not on the flood risk listSO18 2JA: not on the flood risk listSO18 2JF: not on the flood risk listSO18 2JJ: not on the flood risk listSO18 2JP: not on the flood risk listSO18 2JT: not on the flood risk listSO18 2JU: not on the flood risk listSO18 2JW: not on the flood risk listSO18 2JX: not on the flood risk listSO18 2JZ: not on the flood risk listSO18 2LB: not on the flood risk listSO18 2LD: not on the flood risk listSO18 2LE: not on the flood risk listSO18 2LG: not on the flood risk listSO18 2LH: not on the flood risk listSO18 2LJ: not on the flood risk listSO18 2LL: not on the flood risk listSO18 2LN: not on the flood risk listSO18 2LP: not on the flood risk listSO18 2LQ: not on the flood risk listSO18 2LR: not on the flood risk listSO18 2LS: not on the flood risk listSO18 2LT: not on the flood risk listSO18 2LU: not on the flood risk listSO18 2LW: not on the flood risk listSO18 2LX: not on the flood risk listSO18 2LY: not on the flood risk listSO18 2LZ: not on the flood risk listSO18 2NA: not on the flood risk listSO18 2NB: not on the flood risk listSO18 2ND: not on the flood risk listSO18 2NE: not on the flood risk listSO18 2NG: not on the flood risk listSO18 2NL: not on the flood risk listSO18 2NN: not on the flood risk listSO18 2NS: not on the flood risk listSO18 2NU: not on the flood risk listSO18 2NX: not on the flood risk listSO18 2PA: not on the flood risk listSO18 2PB: not on the flood risk listSO18 2PD: not on the flood risk listSO18 2PE: not on the flood risk listSO18 2PG: not on the flood risk listSO18 2PH: not on the flood risk listSO18 2PJ: not on the flood risk listSO18 2PL: not on the flood risk listSO18 2PN: not on the flood risk listSO18 2PP: not on the flood risk listSO18 2PQ: not on the flood risk listSO18 2PR: not on the flood risk listSO18 2PT: not on the flood risk listSO18 2PU: not on the flood risk listSO18 2PW: not on the flood risk listSO18 2PY: not on the flood risk listSO18 2PZ: not on the flood risk listSO18 2QA: not on the flood risk listSO18 2QB: not on the flood risk listSO18 2QD: not on the flood risk listSO18 2QE: not on the flood risk listSO18 2QF: not on the flood risk listSO18 2QG: not on the flood risk listSO18 2QJ: not on the flood risk listSO18 2QL: not on the flood risk listSO18 2QQ: not on the flood risk listSO18 2QR: not on the flood risk listSO18 2QT: not on the flood risk listSO18 2QU: not on the flood risk listSO18 2QW: not on the flood risk listSO18 2QX: not on the flood risk listSO18 2QY: not on the flood risk listSO18 2QZ: not on the flood risk listSO18 2RB: not on the flood risk listSO18 2RD: not on the flood risk listSO18 2RE: not on the flood risk listSO18 2RF: not on the flood risk listSO18 2RG: not on the flood risk listSO18 2RH: not on the flood risk listSO18 2RJ: not on the flood risk listSO18 2RL: not on the flood risk listSO18 2RQ: not on the flood risk listSO18 2RR: not on the flood risk listSO18 2RS: not on the flood risk listSO18 2RY: not on the flood risk listSO18 2RZ: not on the flood risk listSO18 2XU: not on the flood risk listSO18 2XX: not on the flood risk listSO18 2XZ: not on the flood risk listSO18 3AE: not on the flood risk listSO18 3AF: not on the flood risk listSO18 3AG: not on the flood risk listSO18 3BW: not on the flood risk listSO18 3BX: not on the flood risk listSO18 3BY: not on the flood risk listSO18 3BZ: not on the flood risk listSO18 3DA: not on the flood risk listSO18 3DB: not on the flood risk listSO18 3DD: not on the flood risk listSO18 3DE: not on the flood risk listSO18 3DH: not on the flood risk listSO18 3HT: not on the flood risk listSO18 3HY: not on the flood risk listSO18 3JY: not on the flood risk listSO18 3JZ: not on the flood risk listSO18 3LB: not on the flood risk listSO18 3LD: not on the flood risk listSO18 3LE: not on the flood risk listSO18 3LF: not on the flood risk listSO18 3LH: not on the flood risk listSO18 3LJ: not on the flood risk listSO18 3LL: not on the flood risk listSO18 3LN: not on the flood risk listSO18 3LP: not on the flood risk listSO18 3LQ: not on the flood risk listSO18 3LR: not on the flood risk listSO18 3LS: not on the flood risk listSO18 3LW: not on the flood risk listSO18 3LX: not on the flood risk listSO18 3LY: not on the flood risk listSO18 3LZ: not on the flood risk listSO18 3NA: not on the flood risk listSO18 3NB: not on the flood risk listSO18 3ND: not on the flood risk listSO18 3NE: not on the flood risk listSO18 3NF: not on the flood risk listSO18 3NG: not on the flood risk listSO18 3NH: not on the flood risk listSO18 3NJ: not on the flood risk listSO18 3NL: not on the flood risk listSO18 3NP: not on the flood risk listSO18 3NQ: not on the flood risk listSO18 3NR: not on the flood risk listSO18 3NT: not on the flood risk listSO18 3NU: not on the flood risk listSO18 3PA: not on the flood risk listSO18 3PB: not on the flood risk listSO18 3PD: not on the flood risk listSO18 3PE: not on the flood risk listSO18 3PF: not on the flood risk listSO18 3PG: not on the flood risk listSO18 3PH: not on the flood risk listSO18 3PJ: not on the flood risk listSO18 3PN: not on the flood risk listSO18 3PP: not on the flood risk listSO18 3PQ: not on the flood risk listSO18 3PR: not on the flood risk listSO18 3PS: not on the flood risk listSO18 3PT: not on the flood risk listSO18 3PU: not on the flood risk listSO18 3PW: not on the flood risk listSO18 3QA: not on the flood risk listSO18 3QB: not on the flood risk listSO18 3QD: not on the flood risk listSO18 3QE: not on the flood risk listSO18 3QH: not on the flood risk listSO18 3QN: not on the flood risk listSO18 3QP: not on the flood risk listSO18 3QR: not on the flood risk listSO18 3QS: not on the flood risk listSO18 3QT: not on the flood risk listSO18 3QU: not on the flood risk listSO18 3QW: not on the flood risk listSO18 3QX: not on the flood risk listSO18 3RA: not on the flood risk listSO18 3RB: not on the flood risk listSO18 3RP: not on the flood risk listSO18 3RQ: not on the flood risk listSO18 3RR: not on the flood risk listSO18 4AR: not on the flood risk listSO18 4AS: not on the flood risk listSO18 4EE: not on the flood risk listSO18 4EF: not on the flood risk listSO18 4EG: not on the flood risk listSO18 4EH: not on the flood risk listSO18 4EJ: not on the flood risk listSO18 4EN: not on the flood risk listSO18 4EP: not on the flood risk listSO18 4EQ: not on the flood risk listSO18 4ER: not on the flood risk listSO18 4ES: not on the flood risk listSO18 4ET: not on the flood risk listSO18 4EU: not on the flood risk listSO18 4EW: not on the flood risk listSO18 4EX: not on the flood risk listSO18 4EY: not on the flood risk listSO18 4EZ: not on the flood risk listSO18 4FB: not on the flood risk listSO18 4FD: not on the flood risk listSO18 4FE: not on the flood risk listSO18 4FH: not on the flood risk listSO18 4FJ: not on the flood risk listSO18 4FL: not on the flood risk listSO18 4FN: not on the flood risk listSO18 4FP: not on the flood risk listSO18 4FQ: not on the flood risk listSO18 4FR: not on the flood risk listSO18 4GU: not on the flood risk listSO18 4GW: not on the flood risk listSO18 4GX: not on the flood risk listSO18 4GY: not on the flood risk listSO18 4GZ: not on the flood risk listSO18 4HA: not on the flood risk listSO18 4HB: not on the flood risk listSO18 4HD: not on the flood risk listSO18 4HE: not on the flood risk listSO18 4HF: not on the flood risk listSO18 4HH: not on the flood risk listSO18 4HP: not on the flood risk listSO18 4HQ: not on the flood risk listSO18 4HR: not on the flood risk listSO18 4HS: not on the flood risk listSO18 4HT: not on the flood risk listSO18 4HU: not on the flood risk listSO18 4HW: not on the flood risk listSO18 4HX: not on the flood risk listSO18 4HY: not on the flood risk listSO18 4JR: not on the flood risk listSO18 4JU: not on the flood risk listSO18 4PP: not on the flood risk listSO18 4PQ: not on the flood risk listSO18 4PR: not on the flood risk listSO18 4QA: not on the flood risk listSO18 4QD: not on the flood risk listSO18 4QE: not on the flood risk listSO18 4QF: not on the flood risk listSO18 4QG: not on the flood risk listSO18 4QH: not on the flood risk listSO18 4QJ: not on the flood risk listSO18 4QL: not on the flood risk listSO18 4QN: not on the flood risk listSO18 4RA: not on the flood risk listSO18 4RF: not on the flood risk listSO18 4RG: not on the flood risk listSO18 4RH: not on the flood risk listSO18 4RJ: not on the flood risk listSO18 4RL: not on the flood risk listSO18 4RN: not on the flood risk listSO18 4RP: not on the flood risk listSO18 4RQ: not on the flood risk listSO18 4RR: not on the flood risk listSO18 4RS: not on the flood risk listSO18 4RT: not on the flood risk listSO18 4RU: not on the flood risk listSO18 4RW: not on the flood risk listSO18 4RX: not on the flood risk listSO18 4RY: not on the flood risk listSO18 4RZ: not on the flood risk listSO18 4SA: not on the flood risk listSO18 4SB: not on the flood risk listSO18 4SD: not on the flood risk listSO18 4SE: not on the flood risk listSO18 4SF: not on the flood risk listSO18 4SG: not on the flood risk listSO18 4SH: not on the flood risk listSO18 4SJ: not on the flood risk listSO18 4SL: not on the flood risk listSO18 4SN: not on the flood risk listSO18 4SP: not on the flood risk listSO18 4SQ: not on the flood risk listSO18 4SR: not on the flood risk listSO18 4SS: not on the flood risk listSO18 4ST: not on the flood risk listSO18 4SU: not on the flood risk listSO18 4SW: not on the flood risk listSO18 4SX: not on the flood risk listSO18 4SY: not on the flood risk listSO18 4SZ: not on the flood risk listSO18 4TA: not on the flood risk listSO18 4TB: not on the flood risk listSO18 4TD: not on the flood risk listSO18 4TQ: not on the flood risk listSO18 4TS: not on the flood risk listSO18 4UF: not on the flood risk listSO18 5AB: not on the flood risk listSO18 5AD: not on the flood risk listSO18 5AE: not on the flood risk listSO18 5AF: not on the flood risk listSO18 5BQ: not on the flood risk listSO18 5BR: not on the flood risk listSO18 5BS: not on the flood risk listSO18 5BT: not on the flood risk listSO18 5BU: not on the flood risk listSO18 5BW: not on the flood risk listSO18 5BX: not on the flood risk listSO18 5BY: not on the flood risk listSO18 5BZ: not on the flood risk listSO18 5DA: not on the flood risk listSO18 5DB: not on the flood risk listSO18 5DD: not on the flood risk listSO18 5DE: not on the flood risk listSO18 5DF: not on the flood risk listSO18 5DH: not on the flood risk listSO18 5DJ: not on the flood risk listSO18 5DP: not on the flood risk listSO18 5DQ: not on the flood risk listSO18 5DR: not on the flood risk listSO18 5DS: not on the flood risk listSO18 5DT: not on the flood risk listSO18 5DU: not on the flood risk listSO18 5DW: not on the flood risk listSO18 5DX: not on the flood risk listSO18 5DY: not on the flood risk listSO18 5DZ: not on the flood risk listSO18 5EA: not on the flood risk listSO18 5EB: not on the flood risk listSO18 5ED: not on the flood risk listSO18 5EE: not on the flood risk listSO18 5EF: not on the flood risk listSO18 5EG: not on the flood risk listSO18 5EH: not on the flood risk listSO18 5EJ: not on the flood risk listSO18 5EL: not on the flood risk listSO18 5EN: not on the flood risk listSO18 5EP: not on the flood risk listSO18 5EQ: not on the flood risk listSO18 5ER: not on the flood risk listSO18 5EY: not on the flood risk listSO18 5EZ: not on the flood risk listSO18 5FB: not on the flood risk listSO18 5FD: not on the flood risk listSO18 5FE: not on the flood risk listSO18 5FH: not on the flood risk listSO18 5FJ: not on the flood risk listSO18 5FL: not on the flood risk listSO18 5FN: not on the flood risk listSO18 5FP: not on the flood risk listSO18 5FQ: not on the flood risk listSO18 5FR: not on the flood risk listSO18 5FS: not on the flood risk listSO18 5FT: not on the flood risk listSO18 5FU: not on the flood risk listSO18 5FW: not on the flood risk listSO18 5FX: not on the flood risk listSO18 5FY: not on the flood risk listSO18 5FZ: not on the flood risk listSO18 5GA: not on the flood risk listSO18 5GB: not on the flood risk listSO18 5GD: not on the flood risk listSO18 5GE: not on the flood risk listSO18 5GF: not on the flood risk listSO18 5GG: not on the flood risk listSO18 5GH: not on the flood risk listSO18 5GJ: not on the flood risk listSO18 5GL: not on the flood risk listSO18 5GN: not on the flood risk listSO18 5GP: not on the flood risk listSO18 5GQ: not on the flood risk listSO18 5GR: not on the flood risk listSO18 5GS: not on the flood risk listSO18 5GT: not on the flood risk listSO18 5GU: not on the flood risk listSO18 5GW: not on the flood risk listSO18 5GX: not on the flood risk listSO18 5GY: not on the flood risk listSO18 5HA: not on the flood risk listSO18 5HB: not on the flood risk listSO18 5HD: not on the flood risk listSO18 5HE: not on the flood risk listSO18 5HF: not on the flood risk listSO18 5HG: not on the flood risk listSO18 5HH: not on the flood risk listSO18 5HJ: not on the flood risk listSO18 5HL: not on the flood risk listSO18 5HN: not on the flood risk listSO18 5HP: not on the flood risk listSO18 5HQ: not on the flood risk listSO18 5HR: not on the flood risk listSO18 5HS: not on the flood risk listSO18 5HT: not on the flood risk listSO18 5HU: not on the flood risk listSO18 5HW: not on the flood risk listSO18 5HX: not on the flood risk listSO18 5HY: not on the flood risk listSO18 5HZ: not on the flood risk listSO18 5JA: not on the flood risk listSO18 5JB: not on the flood risk listSO18 5JD: not on the flood risk listSO18 5JE: not on the flood risk listSO18 5JF: not on the flood risk listSO18 5JG: not on the flood risk listSO18 5JH: not on the flood risk listSO18 5LB: not on the flood risk listSO18 5LZ: not on the flood risk listSO18 5NA: not on the flood risk listSO18 5NB: not on the flood risk listSO18 5ND: not on the flood risk listSO18 5NE: not on the flood risk listSO18 5NF: not on the flood risk listSO18 5NG: not on the flood risk listSO18 5NH: not on the flood risk listSO18 5NP: not on the flood risk listSO18 5NZ: not on the flood risk listSO18 5PA: not on the flood risk listSO18 5PB: not on the flood risk listSO18 5PE: not on the flood risk listSO18 5PF: not on the flood risk listSO18 5PG: not on the flood risk listSO18 5PQ: not on the flood risk listSO18 5PR: not on the flood risk listSO18 5PS: not on the flood risk listSO18 5PT: not on the flood risk listSO18 5PU: not on the flood risk listSO18 5PW: not on the flood risk listSO18 5PX: not on the flood risk listSO18 5PY: not on the flood risk listSO18 5PZ: not on the flood risk listSO18 5QA: not on the flood risk listSO18 5QB: not on the flood risk listSO18 5QE: not on the flood risk listSO18 5QF: not on the flood risk listSO18 5QG: not on the flood risk listSO18 5QH: not on the flood risk listSO18 5QJ: not on the flood risk listSO18 5QL: not on the flood risk listSO18 5QP: not on the flood risk listSO18 5QQ: not on the flood risk listSO18 5QR: not on the flood risk listSO18 5QS: not on the flood risk listSO18 5QT: not on the flood risk listSO18 5QU: not on the flood risk listSO18 5QW: not on the flood risk listSO18 5QX: not on the flood risk listSO18 5QY: not on the flood risk listSO18 5QZ: not on the flood risk listSO18 5RB: not on the flood risk listSO18 5RD: not on the flood risk listSO18 5RE: not on the flood risk listSO18 5RF: not on the flood risk listSO18 5RG: not on the flood risk listSO18 5RH: not on the flood risk listSO18 5RJ: not on the flood risk listSO18 5RN: not on the flood risk listSO18 5RP: not on the flood risk listSO18 5RQ: not on the flood risk listSO18 5RR: not on the flood risk listSO18 5RS: not on the flood risk listSO18 5RT: not on the flood risk listSO18 5RZ: not on the flood risk listSO18 5SA: not on the flood risk listSO18 5SE: not on the flood risk listSO18 5SF: not on the flood risk listSO18 5SH: not on the flood risk listSO18 5SJ: not on the flood risk listSO18 5SR: not on the flood risk listSO18 5SU: not on the flood risk listSO18 5SW: not on the flood risk listSO18 5SZ: not on the flood risk listSO18 5TB: not on the flood risk listSO18 5TE: not on the flood risk listSO18 5TF: not on the flood risk listSO18 5TG: not on the flood risk listSO18 5TH: not on the flood risk listSO18 5TJ: not on the flood risk listSO18 5TN: not on the flood risk listSO18 5TP: not on the flood risk listSO18 5TQ: not on the flood risk listSO18 5TR: not on the flood risk listSO18 5TS: not on the flood risk listSO18 5TT: not on the flood risk listSO18 5TU: not on the flood risk listSO18 5TW: not on the flood risk listSO18 6AA: not on the flood risk listSO18 6AD: not on the flood risk listSO18 6AE: not on the flood risk listSO18 6AF: not on the flood risk listSO18 6AG: not on the flood risk listSO18 6AH: not on the flood risk listSO18 6AJ: not on the flood risk listSO18 6AN: not on the flood risk listSO18 6AP: not on the flood risk listSO18 6AQ: not on the flood risk listSO18 6AR: not on the flood risk listSO18 6AS: not on the flood risk listSO18 6AU: not on the flood risk listSO18 6AW: not on the flood risk listSO18 6AX: not on the flood risk listSO18 6AY: not on the flood risk listSO18 6AZ: not on the flood risk listSO18 6BA: not on the flood risk listSO18 6BB: not on the flood risk listSO18 6BD: not on the flood risk listSO18 6BE: not on the flood risk listSO18 6BF: not on the flood risk listSO18 6BG: not on the flood risk listSO18 6BH: not on the flood risk listSO18 6BJ: not on the flood risk listSO18 6BL: not on the flood risk listSO18 6BN: not on the flood risk listSO18 6BP: not on the flood risk listSO18 6BR: not on the flood risk listSO18 6BT: not on the flood risk listSO18 6BW: not on the flood risk listSO18 6BX: not on the flood risk listSO18 6LW: not on the flood risk listSO18 6LX: not on the flood risk listSO18 6LY: not on the flood risk listSO18 6NJ: not on the flood risk listSO18 6NL: not on the flood risk listSO18 6NP: not on the flood risk listSO18 6NQ: not on the flood risk listSO18 6NS: not on the flood risk listSO18 6NT: not on the flood risk listSO18 6NU: not on the flood risk listSO18 6NW: not on the flood risk listSO18 6NX: not on the flood risk listSO18 6NY: not on the flood risk listSO18 6PA: not on the flood risk listSO18 6PJ: not on the flood risk listSO18 6PL: not on the flood risk listSO18 6PN: not on the flood risk listSO18 6PP: not on the flood risk listSO18 6QN: not on the flood risk listSO18 6RW: not on the flood risk listSO18 6RX: not on the flood risk listSO18 6SG: not on the flood risk listSO18 6ST: not on the flood risk listSO18 6SX: not on the flood risk listSO18 6TA: not on the flood risk listSO18 6TE: not on the flood risk listSO18 6TF: not on the flood risk listSO18 6TG: not on the flood risk listSO18 6TJ: not on the flood risk listSO18 6TL: not on the flood risk listSO18 6TN: not on the flood risk listSO18 6TW: not on the flood risk listSO18 9SA: not on the flood risk listSO18 2QS: very low flood risk onlySO18 1AL: low flood risk at worstSO18 1AW: low flood risk at worstSO18 1BA: low flood risk at worstSO18 1BB: low flood risk at worstSO18 1BH: low flood risk at worstSO18 1GT: low flood risk at worstSO18 1DH: low flood risk at worstSO18 1GH: low flood risk at worstSO18 1HP: low flood risk at worstSO18 1UH: low flood risk at worstSO18 2DP: low flood risk at worstSO18 2FW: low flood risk at worstSO18 2FX: low flood risk at worstSO18 2JB: low flood risk at worstSO18 2JD: low flood risk at worstSO18 2NF: low flood risk at worstSO18 2NH: low flood risk at worstSO18 2RA: low flood risk at worstSO18 2RP: low flood risk at worstSO18 2RT: low flood risk at worstSO18 3AD: low flood risk at worstSO18 3QL: low flood risk at worstSO18 1BD: medium flood risk at worstSO18 1DU: medium flood risk at worstSO18 1EG: medium flood risk at worstSO18 1ER: medium flood risk at worstSO18 2PF: medium flood risk at worstSO18 2RN: medium flood risk at worstSO18 1AB: high flood riskSO18 1AD: high flood riskSO18 1AX: high flood riskSO18 1AY: high flood riskSO18 1BZ: high flood riskSO18 1DP: high flood riskSO18 1EA: high flood riskSO18 1GB: high flood riskSO18 1GD: high flood riskSO18 1GE: high flood riskSO18 1HL: high flood riskSO18 1NQ: high flood riskSO18 1NX: high flood riskSO18 1QN: high flood riskSO18 1UB: high flood riskSO18 1UD: high flood riskSO18 1UG: high flood riskSO18 1ZA: high flood riskSO18 2HP: high flood riskSO18 2JL: high flood riskSO18 2JQ: high flood riskSO18 2JR: high flood riskSO18 2JY: high flood riskSO18 2LF: high flood riskSO18 2QN: high flood riskSO18 2ST: high flood riskSO18 3HW: high flood risk SouthamptonWest End 6 postcodes at high or medium risk, outlined: this goes to SO18 1AY, the one with most homes and businesses at high risk6 postcodes at high or medium risk Map of every postcode in SO18, by flood risk Of the 940 postcodes in SO18 that ONS places, 29 have a home or business at high risk, 6 are at medium risk at worst, 22 are at low risk at worst, 1 are at very low risk only and 882 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 6 postcodes at high or medium risk. Places named: Southampton, West End. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A335A35A3035 SouthamptonWest End
  • A home or business at high risk: 29
  • At medium risk at worst: 6
  • At low risk at worst: 22
  • At very low risk only: 1
  • Not on the at-risk list: 882
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 940 postcodes in SO18 that ONS places, 29 have a home or business at high risk, 6 are at medium risk at worst, 22 are at low risk at worst, 1 are at very low risk only and 882 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. A dashed outline shows where 5 or more lie within 150 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

The middle of its postcodes: latitude 50.9242, longitude -1.3620. Open this area on OpenStreetMap

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

The postcodes at high risk

29 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

SO18 1HL21 at high riskSO18 1UB15 at high riskSO18 1AY10 at high riskSO18 1EA9 at high riskSO18 1EB9 at high riskSO18 1UG8 at high riskSO18 2JR8 at high riskSO18 3HW7 at high riskSO18 1ED6 at high riskSO18 2JL6 at high riskSO18 1AD5 at high riskSO18 1GB5 at high risk

Where the postcodes at high or medium risk lie together

  • 6 postcodes at high or medium risk, outlined on the map. SO18 1AY, is the one with most homes and businesses at high risk.

What broadband can you get in SO18?

Ofcom reports on 891 of the 940 postcodes in SO18. At 843 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit843 of 891
Postcodes where every home can get superfast878 of 891

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is SO18 at risk of flooding?

58 of the 940 postcodes in SO18 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 218 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 58 of 940 postcodes High: 137Medium: 81Low: 162Very low: 67

High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

What do homes sell for in SO18?

Homes in SO18 sold for a typical £280,000 in the 12 months to August 2026, across 421 sales, no change on the 12 months before, HM Land Registry's figures show.

£280,000 typical price, the 12 months to August 2026
£280,000 12 months to August 2025
■ no change on the 12 months before
  • Detached £384,500 108 sales
  • Semi-detached £325,000 111 sales
  • Terraced £264,275 92 sales
  • Flat or maisonette £159,750 110 sales

Each bar is that kind's typical price, against the most expensive kind here.

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it

Postcodes in SO18

Pick a sector, then a postcode. A sector is the district plus the next digit.

SO18 1193 postcodesSO18 2237 postcodesSO18 383 postcodesSO18 4109 postcodesSO18 5195 postcodesSO18 675 postcodesSO18 948 postcodes
UK postcode format explained

Places in SO18

Towns and villages with postcodes in SO18, and how many each has here.

Southampton postcodes,858West End postcodes,81

Who covers SO18

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Southampton Itchen778
  • Eastleigh92
  • Romsey and Southampton North70

Police force areas

  • Hampshire940

Next to SO18

SO17 postcode district SO19 postcode district All SO districts Southampton postcodes

"Next to" is by number: the districts before and after SO18 in the SO area.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.