DN21 postcode district: Gainsborough and around

DN21 is a postcode district mostly in Lincolnshire, with 1,371 postcodes in use in 6 sectors. It has postcodes in Gainsborough, Kirton in Lindsey and Scotter. It is split between 3 councils: West Lindsey (1,215 postcodes), North Lincolnshire (152) and Bassetlaw (4). 1,215 are in Lincolnshire and 4 in Nottinghamshire. ONS lists no county for the other 152.

Postcodes in use
1,371
Sectors
6
Councils
3 councils
Places
3 places

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

Every postcode in DN21, by flood risk

Map of every postcode in DN21, by flood risk Of the 1,371 postcodes in DN21 that ONS places, 30 have a home or business at high risk, 103 are at medium risk at worst, 151 are at low risk at worst, 44 are at very low risk only and 1,043 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 80 postcodes at high or medium risk. Places named: Gainsborough, Kirton in Lindsey, Messingham, Scotter, Hibaldstow. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A1500 DN21 1AE: not on the flood risk listDN21 1AR: not on the flood risk listDN21 1AW: not on the flood risk listDN21 1AX: not on the flood risk listDN21 1BF: not on the flood risk listDN21 1BG: not on the flood risk listDN21 1BH: not on the flood risk listDN21 1DA: not on the flood risk listDN21 1DY: not on the flood risk listDN21 1DZ: not on the flood risk listDN21 1EB: not on the flood risk listDN21 1ED: not on the flood risk listDN21 1EE: not on the flood risk listDN21 1EF: not on the flood risk listDN21 1EG: not on the flood risk listDN21 1EH: not on the flood risk listDN21 1EJ: not on the flood risk listDN21 1EP: not on the flood risk listDN21 1EU: not on the flood risk listDN21 1EW: not on the flood risk listDN21 1FA: not on the flood risk listDN21 1FB: not on the flood risk listDN21 1FF: not on the flood risk listDN21 1FJ: not on the flood risk listDN21 1FL: not on the flood risk listDN21 1FN: not on the flood risk listDN21 1FW: not on the flood risk listDN21 1FX: not on the flood risk listDN21 1FY: not on the flood risk listDN21 1GA: not on the flood risk listDN21 1GB: not on the flood risk listDN21 1GD: not on the flood risk listDN21 1GE: not on the flood risk listDN21 1GF: not on the flood risk listDN21 1GH: not on the flood risk listDN21 1GP: not on the flood risk listDN21 1GR: not on the flood risk listDN21 1GW: not on the flood risk listDN21 1GX: not on the flood risk listDN21 1GZ: not on the flood risk listDN21 1HG: not on the flood risk listDN21 1HN: not on the flood risk listDN21 1HQ: not on the flood risk listDN21 1HR: not on the flood risk listDN21 1HY: not on the flood risk listDN21 1LT: not on the flood risk listDN21 1NB: not on the flood risk listDN21 1NF: not on the flood risk listDN21 1NH: not on the flood risk listDN21 1NN: not on the flood risk listDN21 1NP: not on the flood risk listDN21 1NW: not on the flood risk listDN21 1NZ: not on the flood risk listDN21 1PB: not on the flood risk listDN21 1PG: not on the flood risk listDN21 1PN: not on the flood risk listDN21 1PR: not on the flood risk listDN21 1PS: not on the flood risk listDN21 1PT: not on the flood risk listDN21 1PU: not on the flood risk listDN21 1PW: not on the flood risk listDN21 1PX: not on the flood risk listDN21 1PZ: not on the flood risk listDN21 1QA: not on the flood risk listDN21 1QB: not on the flood risk listDN21 1QD: not on the flood risk listDN21 1QG: not on the flood risk listDN21 1QS: not on the flood risk listDN21 1QW: not on the flood risk listDN21 1QX: not on the flood risk listDN21 1QZ: not on the flood risk listDN21 1RA: not on the flood risk listDN21 1RD: not on the flood risk listDN21 1RE: not on the flood risk listDN21 1RH: not on the flood risk listDN21 1RJ: not on the flood risk listDN21 1RP: not on the flood risk listDN21 1SA: not on the flood risk listDN21 1SB: not on the flood risk listDN21 1SE: not on the flood risk listDN21 1SG: not on the flood risk listDN21 1SJ: not on the flood risk listDN21 1SP: not on the flood risk listDN21 1SW: not on the flood risk listDN21 1SZ: not on the flood risk listDN21 1TB: not on the flood risk listDN21 1TY: not on the flood risk listDN21 1UA: not on the flood risk listDN21 1UG: not on the flood risk listDN21 1UL: not on the flood risk listDN21 1UN: not on the flood risk listDN21 1UX: not on the flood risk listDN21 1WN: not on the flood risk listDN21 1WZ: not on the flood risk listDN21 1XA: not on the flood risk listDN21 1XG: not on the flood risk listDN21 1XH: not on the flood risk listDN21 1XL: not on the flood risk listDN21 1XP: not on the flood risk listDN21 1YA: not on the flood risk listDN21 1YB: not on the flood risk listDN21 1YR: not on the flood risk listDN21 1ZS: not on the flood risk listDN21 2AG: not on the flood risk listDN21 2AU: not on the flood risk listDN21 2BG: not on the flood risk listDN21 2JA: not on the flood risk listDN21 2QE: not on the flood risk listDN21 2QS: not on the flood risk listDN21 2QT: not on the flood risk listDN21 2QX: not on the flood risk listDN21 2TS: not on the flood risk listDN21 3BF: not on the flood risk listDN21 3BH: not on the flood risk listDN21 3EG: not on the flood risk listDN21 3EL: not on the flood risk listDN21 3FA: not on the flood risk listDN21 3FB: not on the flood risk listDN21 3FD: not on the flood risk listDN21 3FE: not on the flood risk listDN21 3FG: not on the flood risk listDN21 3FJ: not on the flood risk listDN21 3GA: not on the flood risk listDN21 3GR: not on the flood risk listDN21 3HA: not on the flood risk listDN21 3HB: not on the flood risk listDN21 3HE: not on the flood risk listDN21 3HG: not on the flood risk listDN21 3HH: not on the flood risk listDN21 3HJ: not on the flood risk listDN21 3HQ: not on the flood risk listDN21 3HR: not on the flood risk listDN21 3HS: not on the flood risk listDN21 3HU: not on the flood risk listDN21 3HY: not on the flood risk listDN21 3HZ: not on the flood risk listDN21 3JA: not on the flood risk listDN21 3JB: not on the flood risk listDN21 3JD: not on the flood risk listDN21 3JE: not on the flood risk listDN21 3JF: not on the flood risk listDN21 3JH: not on the flood risk listDN21 3JJ: not on the flood risk listDN21 3JQ: not on the flood risk listDN21 3JY: not on the flood risk listDN21 3JZ: not on the flood risk listDN21 3LB: not on the flood risk listDN21 3LF: not on the flood risk listDN21 3LH: not on the flood risk listDN21 3LQ: not on the flood risk listDN21 3LW: not on the flood risk listDN21 3LX: not on the flood risk listDN21 3LY: not on the flood risk listDN21 3LZ: not on the flood risk listDN21 3NA: not on the flood risk listDN21 3NG: not on the flood risk listDN21 3NH: not on the flood risk listDN21 3NR: not on the flood risk listDN21 3NS: not on the flood risk listDN21 3NT: not on the flood risk listDN21 3NW: not on the flood risk listDN21 3NX: not on the flood risk listDN21 3NY: not on the flood risk listDN21 3PA: not on the flood risk listDN21 3PB: not on the flood risk listDN21 3PD: not on the flood risk listDN21 3PE: not on the flood risk listDN21 3PF: not on the flood risk listDN21 3PG: not on the flood risk listDN21 3PP: not on the flood risk listDN21 3PR: not on the flood risk listDN21 3PT: not on the flood risk listDN21 3PU: not on the flood risk listDN21 3PX: not on the flood risk listDN21 3PY: not on the flood risk listDN21 3PZ: not on the flood risk listDN21 3QB: not on the flood risk listDN21 3QP: not on the flood risk listDN21 3QS: not on the flood risk listDN21 3QX: not on the flood risk listDN21 3QZ: not on the flood risk listDN21 3RB: not on the flood risk listDN21 3RG: not on the flood risk listDN21 3RJ: not on the flood risk listDN21 3RL: not on the flood risk listDN21 3RN: not on the flood risk listDN21 3RP: not on the flood risk listDN21 3RT: not on the flood risk listDN21 3RU: not on the flood risk listDN21 3RW: not on the flood risk listDN21 3RX: not on the flood risk listDN21 3RY: not on the flood risk listDN21 3SA: not on the flood risk listDN21 3SB: not on the flood risk listDN21 3SD: not on the flood risk listDN21 3SG: not on the flood risk listDN21 3SP: not on the flood risk listDN21 3SW: not on the flood risk listDN21 3TB: not on the flood risk listDN21 3TE: not on the flood risk listDN21 3TQ: not on the flood risk listDN21 3TR: not on the flood risk listDN21 3TT: not on the flood risk listDN21 3UP: not on the flood risk listDN21 4AA: not on the flood risk listDN21 4AB: not on the flood risk listDN21 4AE: not on the flood risk listDN21 4AH: not on the flood risk listDN21 4AJ: not on the flood risk listDN21 4AN: not on the flood risk listDN21 4AP: not on the flood risk listDN21 4AR: not on the flood risk listDN21 4AS: not on the flood risk listDN21 4AU: not on the flood risk listDN21 4AW: not on the flood risk listDN21 4AX: not on the flood risk listDN21 4AY: not on the flood risk listDN21 4AZ: not on the flood risk listDN21 4BA: not on the flood risk listDN21 4BB: not on the flood risk listDN21 4BD: not on the flood risk listDN21 4BF: not on the flood risk listDN21 4BG: not on the flood risk listDN21 4BJ: not on the flood risk listDN21 4BL: not on the flood risk listDN21 4BT: not on the flood risk listDN21 4DD: not on the flood risk listDN21 4DE: not on the flood risk listDN21 4DH: not on the flood risk listDN21 4DL: not on the flood risk listDN21 4DP: not on the flood risk listDN21 4DR: not on the flood risk listDN21 4DS: not on the flood risk listDN21 4DX: not on the flood risk listDN21 4DY: not on the flood risk listDN21 4EE: not on the flood risk listDN21 4EH: not on the flood risk listDN21 4EL: not on the flood risk listDN21 4EN: not on the flood risk listDN21 4EP: not on the flood risk listDN21 4ER: not on the flood risk listDN21 4ES: not on the flood risk listDN21 4ET: not on the flood risk listDN21 4EU: not on the flood risk listDN21 4EW: not on the flood risk listDN21 4EY: not on the flood risk listDN21 4EZ: not on the flood risk listDN21 4FA: not on the flood risk listDN21 4FD: not on the flood risk listDN21 4FF: not on the flood risk listDN21 4FG: not on the flood risk listDN21 4FL: not on the flood risk listDN21 4GG: not on the flood risk listDN21 4HA: not on the flood risk listDN21 4HB: not on the flood risk listDN21 4HE: not on the flood risk listDN21 4HG: not on the flood risk listDN21 4HH: not on the flood risk listDN21 4HU: not on the flood risk listDN21 4HX: not on the flood risk listDN21 4JB: not on the flood risk listDN21 4JD: not on the flood risk listDN21 4JE: not on the flood risk listDN21 4JF: not on the flood risk listDN21 4JG: not on the flood risk listDN21 4JH: not on the flood risk listDN21 4JL: not on the flood risk listDN21 4JN: not on the flood risk listDN21 4JQ: not on the flood risk listDN21 4JR: not on the flood risk listDN21 4JS: not on the flood risk listDN21 4JT: not on the flood risk listDN21 4JW: not on the flood risk listDN21 4JX: not on the flood risk listDN21 4JZ: not on the flood risk listDN21 4LB: not on the flood risk listDN21 4LD: not on the flood risk listDN21 4LE: not on the flood risk listDN21 4LG: not on the flood risk listDN21 4LJ: not on the flood risk listDN21 4LU: not on the flood risk listDN21 4LY: not on the flood risk listDN21 4NH: not on the flood risk listDN21 4NJ: not on the flood risk listDN21 4NL: not on the flood risk listDN21 4NN: not on the flood risk listDN21 4NP: not on the flood risk listDN21 4PP: not on the flood risk listDN21 4PS: not on the flood risk listDN21 4PT: not on the flood risk listDN21 4PU: not on the flood risk listDN21 4QP: not on the flood risk listDN21 4QX: not on the flood risk listDN21 4RA: not on the flood risk listDN21 4RD: not on the flood risk listDN21 4RE: not on the flood risk listDN21 4RF: not on the flood risk listDN21 4RG: not on the flood risk listDN21 4RH: not on the flood risk listDN21 4RN: not on the flood risk listDN21 4RX: not on the flood risk listDN21 4RY: not on the flood risk listDN21 4RZ: not on the flood risk listDN21 4SD: not on the flood risk listDN21 4SQ: not on the flood risk listDN21 4ST: not on the flood risk listDN21 4SY: not on the flood risk listDN21 4SZ: not on the flood risk listDN21 4TB: not on the flood risk listDN21 4TD: not on the flood risk listDN21 4TE: not on the flood risk listDN21 4TF: not on the flood risk listDN21 4TR: not on the flood risk listDN21 4TT: not on the flood risk listDN21 4TZ: not on the flood risk listDN21 4UA: not on the flood risk listDN21 4UD: not on the flood risk listDN21 4UF: not on the flood risk listDN21 4UH: not on the flood risk listDN21 4UJ: not on the flood risk listDN21 4UL: not on the flood risk listDN21 4UN: not on the flood risk listDN21 4UR: not on the flood risk listDN21 4UT: not on the flood risk listDN21 4UW: not on the flood risk listDN21 5AA: not on the flood risk listDN21 5AD: not on the flood risk listDN21 5AE: not on the flood risk listDN21 5AF: not on the flood risk listDN21 5AG: not on the flood risk listDN21 5AJ: not on the flood risk listDN21 5AQ: not on the flood risk listDN21 5AX: not on the flood risk listDN21 5AY: not on the flood risk listDN21 5BA: not on the flood risk listDN21 5BB: not on the flood risk listDN21 5BD: not on the flood risk listDN21 5BE: not on the flood risk listDN21 5BF: not on the flood risk listDN21 5BG: not on the flood risk listDN21 5BH: not on the flood risk listDN21 5BJ: not on the flood risk listDN21 5BL: not on the flood risk listDN21 5BN: not on the flood risk listDN21 5BP: not on the flood risk listDN21 5BS: not on the flood risk listDN21 5BT: not on the flood risk listDN21 5BU: not on the flood risk listDN21 5BX: not on the flood risk listDN21 5BY: not on the flood risk listDN21 5BZ: not on the flood risk listDN21 5DA: not on the flood risk listDN21 5DB: not on the flood risk listDN21 5DE: not on the flood risk listDN21 5DG: not on the flood risk listDN21 5DH: not on the flood risk listDN21 5DL: not on the flood risk listDN21 5DN: not on the flood risk listDN21 5DP: not on the flood risk listDN21 5DQ: not on the flood risk listDN21 5DR: not on the flood risk listDN21 5DS: not on the flood risk listDN21 5DT: not on the flood risk listDN21 5DU: not on the flood risk listDN21 5DW: not on the flood risk listDN21 5DY: not on the flood risk listDN21 5EE: not on the flood risk listDN21 5EF: not on the flood risk listDN21 5EG: not on the flood risk listDN21 5EH: not on the flood risk listDN21 5EJ: not on the flood risk listDN21 5EN: not on the flood risk listDN21 5EP: not on the flood risk listDN21 5EQ: not on the flood risk listDN21 5ES: not on the flood risk listDN21 5ET: not on the flood risk listDN21 5EU: not on the flood risk listDN21 5EZ: not on the flood risk listDN21 5FA: not on the flood risk listDN21 5FE: not on the flood risk listDN21 5FF: not on the flood risk listDN21 5FN: not on the flood risk listDN21 5FP: not on the flood risk listDN21 5FQ: not on the flood risk listDN21 5GD: not on the flood risk listDN21 5GE: not on the flood risk listDN21 5HB: not on the flood risk listDN21 5HD: not on the flood risk listDN21 5HR: not on the flood risk listDN21 5HS: not on the flood risk listDN21 5HU: not on the flood risk listDN21 5HZ: not on the flood risk listDN21 5JB: not on the flood risk listDN21 5JD: not on the flood risk listDN21 5JF: not on the flood risk listDN21 5JJ: not on the flood risk listDN21 5JL: not on the flood risk listDN21 5JN: not on the flood risk listDN21 5JP: not on the flood risk listDN21 5JW: not on the flood risk listDN21 5LB: not on the flood risk listDN21 5LD: not on the flood risk listDN21 5LE: not on the flood risk listDN21 5LF: not on the flood risk listDN21 5LG: not on the flood risk listDN21 5LJ: not on the flood risk listDN21 5LL: not on the flood risk listDN21 5LN: not on the flood risk listDN21 5LQ: not on the flood risk listDN21 5LS: not on the flood risk listDN21 5LT: not on the flood risk listDN21 5LW: not on the flood risk listDN21 5LY: not on the flood risk listDN21 5NA: not on the flood risk listDN21 5ND: not on the flood risk listDN21 5NF: not on the flood risk listDN21 5NH: not on the flood risk listDN21 5NL: not on the flood risk listDN21 5NQ: not on the flood risk listDN21 5NT: not on the flood risk listDN21 5NW: not on the flood risk listDN21 5NY: not on the flood risk listDN21 5PA: not on the flood risk listDN21 5PE: not on the flood risk listDN21 5PG: not on the flood risk listDN21 5PJ: not on the flood risk listDN21 5PL: not on the flood risk listDN21 5PN: not on the flood risk listDN21 5PQ: not on the flood risk listDN21 5PR: not on the flood risk listDN21 5PT: not on the flood risk listDN21 5PU: not on the flood risk listDN21 5PX: not on the flood risk listDN21 5PY: not on the flood risk listDN21 5PZ: not on the flood risk listDN21 5QA: not on the flood risk listDN21 5QB: not on the flood risk listDN21 5QE: not on the flood risk listDN21 5QL: not on the flood risk listDN21 5QN: not on the flood risk listDN21 5QS: not on the flood risk listDN21 5QT: not on the flood risk listDN21 5QW: not on the flood risk listDN21 5QX: not on the flood risk listDN21 5QZ: not on the flood risk listDN21 5RB: not on the flood risk listDN21 5RD: not on the flood risk listDN21 5RE: not on the flood risk listDN21 5RF: not on the flood risk listDN21 5RG: not on the flood risk listDN21 5RH: not on the flood risk listDN21 5RJ: not on the flood risk listDN21 5RP: not on the flood risk listDN21 5RQ: not on the flood risk listDN21 5RT: not on the flood risk listDN21 5RU: not on the flood risk listDN21 5RX: not on the flood risk listDN21 5RY: not on the flood risk listDN21 5RZ: not on the flood risk listDN21 5SA: not on the flood risk listDN21 5SD: not on the flood risk listDN21 5SH: not on the flood risk listDN21 5SL: not on the flood risk listDN21 5SN: not on the flood risk listDN21 5SQ: not on the flood risk listDN21 5SS: not on the flood risk listDN21 5TH: not on the flood risk listDN21 5TJ: not on the flood risk listDN21 5TL: not on the flood risk listDN21 5TN: not on the flood risk listDN21 5TP: not on the flood risk listDN21 5TQ: not on the flood risk listDN21 5TR: not on the flood risk listDN21 5TS: not on the flood risk listDN21 5TT: not on the flood risk listDN21 5TU: not on the flood risk listDN21 5TX: not on the flood risk listDN21 5TY: not on the flood risk listDN21 5UA: not on the flood risk listDN21 5UD: not on the flood risk listDN21 5UE: not on the flood risk listDN21 5UF: not on the flood risk listDN21 5UH: not on the flood risk listDN21 5UJ: not on the flood risk listDN21 5UL: not on the flood risk listDN21 5UP: not on the flood risk listDN21 5UT: not on the flood risk listDN21 5UU: not on the flood risk listDN21 5UW: not on the flood risk listDN21 5UX: not on the flood risk listDN21 5UY: not on the flood risk listDN21 5UZ: not on the flood risk listDN21 5XA: not on the flood risk listDN21 5XB: not on the flood risk listDN21 5XD: not on the flood risk listDN21 5XH: not on the flood risk listDN21 5XL: not on the flood risk listDN21 5XP: not on the flood risk listDN21 5XS: not on the flood risk listDN21 2AR: very low flood risk onlyDN21 2FL: very low flood risk onlyDN21 2JX: very low flood risk onlyDN21 2PE: very low flood risk onlyDN21 3AP: very low flood risk onlyDN21 3DW: very low flood risk onlyDN21 3EA: very low flood risk onlyDN21 3EE: very low flood risk onlyDN21 3HP: very low flood risk onlyDN21 3QD: very low flood risk onlyDN21 4QJ: very low flood risk onlyDN21 4RW: very low flood risk onlyDN21 5AH: very low flood risk onlyDN21 5FG: very low flood risk onlyDN21 5JT: very low flood risk onlyDN21 5LH: very low flood risk onlyDN21 1AA: low flood risk at worstDN21 1AB: low flood risk at worstDN21 1AF: low flood risk at worstDN21 1AH: low flood risk at worstDN21 1AJ: low flood risk at worstDN21 1AN: low flood risk at worstDN21 1AP: low flood risk at worstDN21 1LL: low flood risk at worstDN21 1DE: low flood risk at worstDN21 1HS: low flood risk at worstDN21 1JF: low flood risk at worstDN21 1BY: low flood risk at worstDN21 1DJ: low flood risk at worstDN21 1GG: low flood risk at worstDN21 1HT: low flood risk at worstDN21 1JA: low flood risk at worstDN21 1LH: low flood risk at worstDN21 1LQ: low flood risk at worstDN21 2EA: low flood risk at worstDN21 2BP: low flood risk at worstDN21 2DL: low flood risk at worstDN21 2EW: low flood risk at worstDN21 2UD: low flood risk at worstDN21 3AH: low flood risk at worstDN21 3AJ: low flood risk at worstDN21 3AN: low flood risk at worstDN21 3BJ: low flood risk at worstDN21 3BN: low flood risk at worstDN21 3BU: low flood risk at worstDN21 3BZ: low flood risk at worstDN21 3DA: low flood risk at worstDN21 3DB: low flood risk at worstDN21 3DE: low flood risk at worstDN21 3DF: low flood risk at worstDN21 3DQ: low flood risk at worstDN21 3DT: low flood risk at worstDN21 3EB: low flood risk at worstDN21 3DY: low flood risk at worstDN21 3DZ: low flood risk at worstDN21 3ED: low flood risk at worstDN21 3EF: low flood risk at worstDN21 3EH: low flood risk at worstDN21 3EN: low flood risk at worstDN21 3EP: low flood risk at worstDN21 3EQ: low flood risk at worstDN21 3ER: low flood risk at worstDN21 3ES: low flood risk at worstDN21 3EW: low flood risk at worstDN21 3EX: low flood risk at worstDN21 3EY: low flood risk at worstDN21 3GD: low flood risk at worstDN21 3GE: low flood risk at worstDN21 3LA: low flood risk at worstDN21 3LJ: low flood risk at worstDN21 3LN: low flood risk at worstDN21 3NP: low flood risk at worstDN21 3PS: low flood risk at worstDN21 3QE: low flood risk at worstDN21 3QF: low flood risk at worstDN21 3QT: low flood risk at worstDN21 3QU: low flood risk at worstDN21 3UG: low flood risk at worstDN21 4AL: low flood risk at worstDN21 4AT: low flood risk at worstDN21 4TP: low flood risk at worstDN21 4UP: low flood risk at worstDN21 5AL: low flood risk at worstDN21 5AN: low flood risk at worstDN21 5JZ: low flood risk at worstDN21 5NR: low flood risk at worstDN21 5JH: medium flood risk at worstDN21 2FE: medium flood risk at worstDN21 2FF: medium flood risk at worstDN21 2NU: medium flood risk at worstDN21 2TD: medium flood risk at worstDN21 2LY: medium flood risk at worstDN21 2LA: medium flood risk at worstDN21 2LD: medium flood risk at worstDN21 2LE: medium flood risk at worstDN21 2NP: medium flood risk at worstDN21 2NR: medium flood risk at worstDN21 2NT: medium flood risk at worstDN21 2NW: medium flood risk at worstDN21 2NX: medium flood risk at worstDN21 2SE: medium flood risk at worstDN21 2RH: medium flood risk at worstDN21 2RL: medium flood risk at worstDN21 2UJ: medium flood risk at worstDN21 2UR: medium flood risk at worstDN21 2SZ: medium flood risk at worstDN21 2TA: medium flood risk at worstDN21 2TB: medium flood risk at worstDN21 2TF: medium flood risk at worstDN21 2TX: medium flood risk at worstDN21 2TU: medium flood risk at worstDN21 3AA: medium flood risk at worstDN21 3AD: medium flood risk at worstDN21 3BT: medium flood risk at worstDN21 3DD: medium flood risk at worstDN21 3DG: medium flood risk at worstDN21 3DP: medium flood risk at worstDN21 3DR: medium flood risk at worstDN21 3DS: medium flood risk at worstDN21 3ET: medium flood risk at worstDN21 3EU: medium flood risk at worstDN21 3JN: medium flood risk at worstDN21 3LL: medium flood risk at worstDN21 3NU: medium flood risk at worstDN21 4QR: medium flood risk at worstDN21 4RS: medium flood risk at worstDN21 4SS: medium flood risk at worstDN21 4SX: medium flood risk at worstDN21 4TG: medium flood risk at worstDN21 4UB: medium flood risk at worstDN21 4UQ: medium flood risk at worstDN21 4UU: medium flood risk at worstDN21 4UX: medium flood risk at worstDN21 5AW: medium flood risk at worstDN21 5BQ: medium flood risk at worstDN21 5PB: medium flood risk at worstDN21 1AY: high flood riskDN21 1NE: high flood riskDN21 1NG: high flood riskDN21 1NQ: high flood riskDN21 2FG: high flood riskDN21 2TE: high flood riskDN21 3BY: high flood riskDN21 3DJ: high flood riskDN21 3FF: high flood riskDN21 3JX: high flood riskDN21 3LE: high flood riskDN21 3UQ: high flood riskDN21 3UR: high flood riskDN21 4BX: high flood riskDN21 4LQ: high flood riskDN21 4QL: high flood riskDN21 4QN: high flood riskDN21 4QS: high flood riskDN21 4RB: high flood riskDN21 4RL: high flood riskDN21 4RP: high flood riskDN21 4RT: high flood riskDN21 4RU: high flood riskDN21 4TQ: high flood riskDN21 4UE: high flood riskDN21 4UG: high flood riskDN21 5AP: high flood riskDN21 5JX: high flood riskDN21 5NZ: high flood riskDN21 5PD: high flood risk GainsboroughKirton in LindseyMessinghamScotterHibaldstow 80 postcodes at high or medium risk, outlined: this goes to DN21 2FG, the one with most homes and businesses at high risk80 postcodes at high or medium risk Map of every postcode in DN21, by flood risk Of the 1,371 postcodes in DN21 that ONS places, 30 have a home or business at high risk, 103 are at medium risk at worst, 151 are at low risk at worst, 44 are at very low risk only and 1,043 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 80 postcodes at high or medium risk. Places named: Gainsborough, Kirton in Lindsey, Messingham, Scotter. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 5 km. GainsboroughKirton in LindseyMessinghamScotter
  • A home or business at high risk: 30
  • At medium risk at worst: 103
  • At low risk at worst: 151
  • At very low risk only: 44
  • Not on the at-risk list: 1,043
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 1,371 postcodes in DN21 that ONS places, 30 have a home or business at high risk, 103 are at medium risk at worst, 151 are at low risk at worst, 44 are at very low risk only and 1,043 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 170 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 53.4192, longitude -0.7037. 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

30 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.

DN21 4RT13 at high riskDN21 1NQ12 at high riskDN21 1AY9 at high riskDN21 1NG8 at high riskDN21 4BX7 at high riskDN21 1NE5 at high riskDN21 3UR4 at high riskDN21 4LQ4 at high riskDN21 4RU4 at high riskDN21 2FG3 at high riskDN21 3JX3 at high riskDN21 3FF3 at high risk

Where the postcodes at high or medium risk lie together

  • 80 postcodes at high or medium risk, outlined on the map. DN21 2FG, is the one with most homes and businesses at high risk.

What broadband can you get in DN21?

Ofcom reports on 1,335 of the 1,371 postcodes in DN21. At 802 of them every home and business can get gigabit broadband, and at 20 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit802 of 1,335
Postcodes where every home can get superfast1,043 of 1,335
Postcodes where some cannot get decent broadband20 of 1,335

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 DN21 at risk of flooding?

328 of the 1,371 postcodes in DN21 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 1,688 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 328 of 1,371 postcodes High: 101Medium: 1,587Low: 2,313Very low: 1,067

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 DN21?

Homes in DN21 sold for a typical £177,500 in the 12 months to August 2026, across 486 sales, up 1.4% on the 12 months before, HM Land Registry's figures show.

£177,500 typical price, the 12 months to August 2026
£175,000 12 months to August 2025
▲ up 1.4% on the 12 months before
  • Detached £279,000 188 sales
  • Semi-detached £170,000 136 sales
  • Terraced £110,000 147 sales
  • Flat or maisonette £80,000 15 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 DN21

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

DN21 1372 postcodesDN21 2212 postcodesDN21 3268 postcodesDN21 4243 postcodesDN21 5266 postcodesDN21 910 postcodes
UK postcode format explained

Places in DN21

Towns and villages with postcodes in DN21, and how many each has here.

Gainsborough postcodes,610Kirton in Lindsey postcodes,109Scotter postcodes,85

Who covers DN21

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

  • Gainsborough1,215
  • Scunthorpe152
  • Bassetlaw4

Police force areas

  • Lincolnshire1,215
  • Humberside152
  • Nottinghamshire4

Next to DN21

DN20 postcode district DN22 postcode district All DN districts Gainsborough postcodes

"Next to" is by number: the districts before and after DN21 in the DN area.

Check a postcode

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