HP21 postcode district: Aylesbury and around, Buckinghamshire

HP21 is a postcode district in England, with 725 postcodes in use in 3 sectors. It has postcodes in Aylesbury. Its council is Buckinghamshire.

Postcodes in use
725
Sectors
3
Council
Buckinghamshire
Places
Aylesbury

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

Every postcode in HP21, by flood risk

Map of every postcode in HP21, by flood risk Of the 725 postcodes in HP21 that ONS places, 9 have a home or business at high risk, 12 are at medium risk at worst, 46 are at low risk at worst, 12 are at very low risk only and 646 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 11 postcodes at high or medium risk. Places named: Aylesbury. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. HP21 7AA: not on the flood risk listHP21 7AB: not on the flood risk listHP21 7AD: not on the flood risk listHP21 7AE: not on the flood risk listHP21 7AG: not on the flood risk listHP21 7AH: not on the flood risk listHP21 7AJ: not on the flood risk listHP21 7AL: not on the flood risk listHP21 7AN: not on the flood risk listHP21 7AP: not on the flood risk listHP21 7AR: not on the flood risk listHP21 7AS: not on the flood risk listHP21 7AW: not on the flood risk listHP21 7AX: not on the flood risk listHP21 7BA: not on the flood risk listHP21 7BD: not on the flood risk listHP21 7BE: not on the flood risk listHP21 7BG: not on the flood risk listHP21 7BQ: not on the flood risk listHP21 7BY: not on the flood risk listHP21 7BZ: not on the flood risk listHP21 7DR: not on the flood risk listHP21 7DX: not on the flood risk listHP21 7DY: not on the flood risk listHP21 7DZ: not on the flood risk listHP21 7EA: not on the flood risk listHP21 7EB: not on the flood risk listHP21 7ED: not on the flood risk listHP21 7EE: not on the flood risk listHP21 7EF: not on the flood risk listHP21 7EG: not on the flood risk listHP21 7EH: not on the flood risk listHP21 7EJ: not on the flood risk listHP21 7EL: not on the flood risk listHP21 7EN: not on the flood risk listHP21 7EP: not on the flood risk listHP21 7EQ: not on the flood risk listHP21 7ER: not on the flood risk listHP21 7ES: not on the flood risk listHP21 7ET: not on the flood risk listHP21 7EU: not on the flood risk listHP21 7EW: not on the flood risk listHP21 7EX: not on the flood risk listHP21 7EY: not on the flood risk listHP21 7EZ: not on the flood risk listHP21 7FA: not on the flood risk listHP21 7FB: not on the flood risk listHP21 7FD: not on the flood risk listHP21 7FE: not on the flood risk listHP21 7FF: not on the flood risk listHP21 7FG: not on the flood risk listHP21 7FH: not on the flood risk listHP21 7FJ: not on the flood risk listHP21 7FL: not on the flood risk listHP21 7FQ: not on the flood risk listHP21 7FT: not on the flood risk listHP21 7FU: not on the flood risk listHP21 7FX: not on the flood risk listHP21 7FY: not on the flood risk listHP21 7FZ: not on the flood risk listHP21 7GB: not on the flood risk listHP21 7HA: not on the flood risk listHP21 7HB: not on the flood risk listHP21 7HD: not on the flood risk listHP21 7HE: not on the flood risk listHP21 7HF: not on the flood risk listHP21 7HG: not on the flood risk listHP21 7HH: not on the flood risk listHP21 7HJ: not on the flood risk listHP21 7HL: not on the flood risk listHP21 7HN: not on the flood risk listHP21 7HP: not on the flood risk listHP21 7HQ: not on the flood risk listHP21 7HR: not on the flood risk listHP21 7HS: not on the flood risk listHP21 7HT: not on the flood risk listHP21 7HU: not on the flood risk listHP21 7HW: not on the flood risk listHP21 7HX: not on the flood risk listHP21 7HY: not on the flood risk listHP21 7HZ: not on the flood risk listHP21 7JA: not on the flood risk listHP21 7JB: not on the flood risk listHP21 7JD: not on the flood risk listHP21 7JE: not on the flood risk listHP21 7JF: not on the flood risk listHP21 7JG: not on the flood risk listHP21 7JH: not on the flood risk listHP21 7JJ: not on the flood risk listHP21 7JL: not on the flood risk listHP21 7JN: not on the flood risk listHP21 7JP: not on the flood risk listHP21 7JQ: not on the flood risk listHP21 7JR: not on the flood risk listHP21 7JS: not on the flood risk listHP21 7JT: not on the flood risk listHP21 7JU: not on the flood risk listHP21 7JW: not on the flood risk listHP21 7JX: not on the flood risk listHP21 7JY: not on the flood risk listHP21 7JZ: not on the flood risk listHP21 7LA: not on the flood risk listHP21 7LD: not on the flood risk listHP21 7LE: not on the flood risk listHP21 7LF: not on the flood risk listHP21 7LG: not on the flood risk listHP21 7LH: not on the flood risk listHP21 7LJ: not on the flood risk listHP21 7LL: not on the flood risk listHP21 7LN: not on the flood risk listHP21 7LP: not on the flood risk listHP21 7LQ: not on the flood risk listHP21 7LR: not on the flood risk listHP21 7LS: not on the flood risk listHP21 7LT: not on the flood risk listHP21 7LU: not on the flood risk listHP21 7LW: not on the flood risk listHP21 7LZ: not on the flood risk listHP21 7NA: not on the flood risk listHP21 7NB: not on the flood risk listHP21 7ND: not on the flood risk listHP21 7NE: not on the flood risk listHP21 7NF: not on the flood risk listHP21 7NG: not on the flood risk listHP21 7NH: not on the flood risk listHP21 7NN: not on the flood risk listHP21 7NQ: not on the flood risk listHP21 7NR: not on the flood risk listHP21 7NS: not on the flood risk listHP21 7NT: not on the flood risk listHP21 7NU: not on the flood risk listHP21 7NX: not on the flood risk listHP21 7NY: not on the flood risk listHP21 7NZ: not on the flood risk listHP21 7PE: not on the flood risk listHP21 7PF: not on the flood risk listHP21 7PG: not on the flood risk listHP21 7PH: not on the flood risk listHP21 7PJ: not on the flood risk listHP21 7PL: not on the flood risk listHP21 7PN: not on the flood risk listHP21 7PP: not on the flood risk listHP21 7PQ: not on the flood risk listHP21 7PR: not on the flood risk listHP21 7PS: not on the flood risk listHP21 7PT: not on the flood risk listHP21 7PU: not on the flood risk listHP21 7PX: not on the flood risk listHP21 7PY: not on the flood risk listHP21 7PZ: not on the flood risk listHP21 7QA: not on the flood risk listHP21 7QP: not on the flood risk listHP21 7QQ: not on the flood risk listHP21 7QU: not on the flood risk listHP21 7QX: not on the flood risk listHP21 7QY: not on the flood risk listHP21 7RA: not on the flood risk listHP21 7RB: not on the flood risk listHP21 7RD: not on the flood risk listHP21 7RF: not on the flood risk listHP21 7RG: not on the flood risk listHP21 7RH: not on the flood risk listHP21 7RL: not on the flood risk listHP21 7RP: not on the flood risk listHP21 7RR: not on the flood risk listHP21 7RS: not on the flood risk listHP21 7RT: not on the flood risk listHP21 7RU: not on the flood risk listHP21 7RW: not on the flood risk listHP21 7RX: not on the flood risk listHP21 7RZ: not on the flood risk listHP21 7SG: not on the flood risk listHP21 7SL: not on the flood risk listHP21 7SN: not on the flood risk listHP21 7SR: not on the flood risk listHP21 7ST: not on the flood risk listHP21 7SX: not on the flood risk listHP21 7TA: not on the flood risk listHP21 7TB: not on the flood risk listHP21 7TD: not on the flood risk listHP21 7TE: not on the flood risk listHP21 7TF: not on the flood risk listHP21 7TG: not on the flood risk listHP21 7TL: not on the flood risk listHP21 7TN: not on the flood risk listHP21 7TR: not on the flood risk listHP21 7TW: not on the flood risk listHP21 7UD: not on the flood risk listHP21 7UE: not on the flood risk listHP21 7UH: not on the flood risk listHP21 7UT: not on the flood risk listHP21 7UU: not on the flood risk listHP21 7UZ: not on the flood risk listHP21 8AA: not on the flood risk listHP21 8AD: not on the flood risk listHP21 8AF: not on the flood risk listHP21 8AG: not on the flood risk listHP21 8AH: not on the flood risk listHP21 8AJ: not on the flood risk listHP21 8AL: not on the flood risk listHP21 8AP: not on the flood risk listHP21 8AQ: not on the flood risk listHP21 8AR: not on the flood risk listHP21 8AS: not on the flood risk listHP21 8AT: not on the flood risk listHP21 8AU: not on the flood risk listHP21 8AX: not on the flood risk listHP21 8AY: not on the flood risk listHP21 8BA: not on the flood risk listHP21 8BD: not on the flood risk listHP21 8BE: not on the flood risk listHP21 8BF: not on the flood risk listHP21 8BG: not on the flood risk listHP21 8BH: not on the flood risk listHP21 8BJ: not on the flood risk listHP21 8BL: not on the flood risk listHP21 8BN: not on the flood risk listHP21 8BP: not on the flood risk listHP21 8BQ: not on the flood risk listHP21 8BS: not on the flood risk listHP21 8BU: not on the flood risk listHP21 8BW: not on the flood risk listHP21 8BX: not on the flood risk listHP21 8BY: not on the flood risk listHP21 8DA: not on the flood risk listHP21 8DB: not on the flood risk listHP21 8DH: not on the flood risk listHP21 8DJ: not on the flood risk listHP21 8DL: not on the flood risk listHP21 8DN: not on the flood risk listHP21 8DP: not on the flood risk listHP21 8DQ: not on the flood risk listHP21 8DS: not on the flood risk listHP21 8DT: not on the flood risk listHP21 8DU: not on the flood risk listHP21 8DW: not on the flood risk listHP21 8DX: not on the flood risk listHP21 8DY: not on the flood risk listHP21 8EF: not on the flood risk listHP21 8EG: not on the flood risk listHP21 8EH: not on the flood risk listHP21 8EJ: not on the flood risk listHP21 8EL: not on the flood risk listHP21 8EP: not on the flood risk listHP21 8EQ: not on the flood risk listHP21 8ER: not on the flood risk listHP21 8ES: not on the flood risk listHP21 8ET: not on the flood risk listHP21 8EU: not on the flood risk listHP21 8EX: not on the flood risk listHP21 8EY: not on the flood risk listHP21 8EZ: not on the flood risk listHP21 8FS: not on the flood risk listHP21 8FY: not on the flood risk listHP21 8GA: not on the flood risk listHP21 8GT: not on the flood risk listHP21 8GU: not on the flood risk listHP21 8GY: not on the flood risk listHP21 8GZ: not on the flood risk listHP21 8HA: not on the flood risk listHP21 8HB: not on the flood risk listHP21 8HD: not on the flood risk listHP21 8HF: not on the flood risk listHP21 8HQ: not on the flood risk listHP21 8HR: not on the flood risk listHP21 8HS: not on the flood risk listHP21 8HT: not on the flood risk listHP21 8HU: not on the flood risk listHP21 8HW: not on the flood risk listHP21 8HX: not on the flood risk listHP21 8HY: not on the flood risk listHP21 8HZ: not on the flood risk listHP21 8JB: not on the flood risk listHP21 8JD: not on the flood risk listHP21 8JE: not on the flood risk listHP21 8JF: not on the flood risk listHP21 8JG: not on the flood risk listHP21 8JH: not on the flood risk listHP21 8JJ: not on the flood risk listHP21 8JN: not on the flood risk listHP21 8JQ: not on the flood risk listHP21 8JR: not on the flood risk listHP21 8JS: not on the flood risk listHP21 8JT: not on the flood risk listHP21 8JW: not on the flood risk listHP21 8JY: not on the flood risk listHP21 8JZ: not on the flood risk listHP21 8LA: not on the flood risk listHP21 8LB: not on the flood risk listHP21 8LH: not on the flood risk listHP21 8LQ: not on the flood risk listHP21 8LR: not on the flood risk listHP21 8LX: not on the flood risk listHP21 8NE: not on the flood risk listHP21 8NF: not on the flood risk listHP21 8NG: not on the flood risk listHP21 8NH: not on the flood risk listHP21 8NJ: not on the flood risk listHP21 8NL: not on the flood risk listHP21 8NN: not on the flood risk listHP21 8NP: not on the flood risk listHP21 8NQ: not on the flood risk listHP21 8NR: not on the flood risk listHP21 8NS: not on the flood risk listHP21 8NT: not on the flood risk listHP21 8NW: not on the flood risk listHP21 8PF: not on the flood risk listHP21 8PG: not on the flood risk listHP21 8PH: not on the flood risk listHP21 8PJ: not on the flood risk listHP21 8PL: not on the flood risk listHP21 8PP: not on the flood risk listHP21 8PQ: not on the flood risk listHP21 8PS: not on the flood risk listHP21 8PT: not on the flood risk listHP21 8PU: not on the flood risk listHP21 8PX: not on the flood risk listHP21 8PY: not on the flood risk listHP21 8QA: not on the flood risk listHP21 8QB: not on the flood risk listHP21 8QD: not on the flood risk listHP21 8QY: not on the flood risk listHP21 8RJ: not on the flood risk listHP21 8RL: not on the flood risk listHP21 8RP: not on the flood risk listHP21 8RR: not on the flood risk listHP21 8RS: not on the flood risk listHP21 8RT: not on the flood risk listHP21 8RU: not on the flood risk listHP21 8RW: not on the flood risk listHP21 8RX: not on the flood risk listHP21 8RZ: not on the flood risk listHP21 8SU: not on the flood risk listHP21 8SX: not on the flood risk listHP21 8SY: not on the flood risk listHP21 8TA: not on the flood risk listHP21 8TB: not on the flood risk listHP21 8TD: not on the flood risk listHP21 8TJ: not on the flood risk listHP21 8TN: not on the flood risk listHP21 8TP: not on the flood risk listHP21 8TR: not on the flood risk listHP21 8TS: not on the flood risk listHP21 8TU: not on the flood risk listHP21 8TW: not on the flood risk listHP21 8TX: not on the flood risk listHP21 8TZ: not on the flood risk listHP21 8UD: not on the flood risk listHP21 8UE: not on the flood risk listHP21 8UF: not on the flood risk listHP21 8UG: not on the flood risk listHP21 8UH: not on the flood risk listHP21 8UJ: not on the flood risk listHP21 8XA: not on the flood risk listHP21 8XL: not on the flood risk listHP21 8XN: not on the flood risk listHP21 8XS: not on the flood risk listHP21 8XW: not on the flood risk listHP21 8YA: not on the flood risk listHP21 8YB: not on the flood risk listHP21 8YD: not on the flood risk listHP21 8YE: not on the flood risk listHP21 8YG: not on the flood risk listHP21 8YH: not on the flood risk listHP21 8YJ: not on the flood risk listHP21 8YL: not on the flood risk listHP21 8YN: not on the flood risk listHP21 8YP: not on the flood risk listHP21 8YQ: not on the flood risk listHP21 8YS: not on the flood risk listHP21 8YT: not on the flood risk listHP21 8YU: not on the flood risk listHP21 8YW: not on the flood risk listHP21 8YX: not on the flood risk listHP21 8YY: not on the flood risk listHP21 9AA: not on the flood risk listHP21 9AB: not on the flood risk listHP21 9AD: not on the flood risk listHP21 9AE: not on the flood risk listHP21 9AF: not on the flood risk listHP21 9AG: not on the flood risk listHP21 9AH: not on the flood risk listHP21 9AJ: not on the flood risk listHP21 9AL: not on the flood risk listHP21 9AP: not on the flood risk listHP21 9AQ: not on the flood risk listHP21 9AR: not on the flood risk listHP21 9AS: not on the flood risk listHP21 9AU: not on the flood risk listHP21 9AX: not on the flood risk listHP21 9AY: not on the flood risk listHP21 9AZ: not on the flood risk listHP21 9BD: not on the flood risk listHP21 9BE: not on the flood risk listHP21 9BG: not on the flood risk listHP21 9BH: not on the flood risk listHP21 9BJ: not on the flood risk listHP21 9BL: not on the flood risk listHP21 9BN: not on the flood risk listHP21 9BP: not on the flood risk listHP21 9BS: not on the flood risk listHP21 9BT: not on the flood risk listHP21 9BU: not on the flood risk listHP21 9BW: not on the flood risk listHP21 9BX: not on the flood risk listHP21 9BY: not on the flood risk listHP21 9BZ: not on the flood risk listHP21 9DA: not on the flood risk listHP21 9DB: not on the flood risk listHP21 9DD: not on the flood risk listHP21 9DE: not on the flood risk listHP21 9DF: not on the flood risk listHP21 9DG: not on the flood risk listHP21 9DH: not on the flood risk listHP21 9DJ: not on the flood risk listHP21 9DL: not on the flood risk listHP21 9DN: not on the flood risk listHP21 9DP: not on the flood risk listHP21 9DQ: not on the flood risk listHP21 9DR: not on the flood risk listHP21 9DS: not on the flood risk listHP21 9DT: not on the flood risk listHP21 9DU: not on the flood risk listHP21 9DW: not on the flood risk listHP21 9DZ: not on the flood risk listHP21 9EA: not on the flood risk listHP21 9EB: not on the flood risk listHP21 9ED: not on the flood risk listHP21 9EE: not on the flood risk listHP21 9EF: not on the flood risk listHP21 9EG: not on the flood risk listHP21 9EP: not on the flood risk listHP21 9EQ: not on the flood risk listHP21 9ER: not on the flood risk listHP21 9ET: not on the flood risk listHP21 9EU: not on the flood risk listHP21 9EX: not on the flood risk listHP21 9EY: not on the flood risk listHP21 9EZ: not on the flood risk listHP21 9FA: not on the flood risk listHP21 9FE: not on the flood risk listHP21 9FF: not on the flood risk listHP21 9FG: not on the flood risk listHP21 9FN: not on the flood risk listHP21 9FQ: not on the flood risk listHP21 9FU: not on the flood risk listHP21 9FW: not on the flood risk listHP21 9FY: not on the flood risk listHP21 9FZ: not on the flood risk listHP21 9GD: not on the flood risk listHP21 9GH: not on the flood risk listHP21 9GJ: not on the flood risk listHP21 9GL: not on the flood risk listHP21 9GN: not on the flood risk listHP21 9GP: not on the flood risk listHP21 9GQ: not on the flood risk listHP21 9GR: not on the flood risk listHP21 9GS: not on the flood risk listHP21 9GT: not on the flood risk listHP21 9GU: not on the flood risk listHP21 9GW: not on the flood risk listHP21 9GX: not on the flood risk listHP21 9HD: not on the flood risk listHP21 9HE: not on the flood risk listHP21 9HF: not on the flood risk listHP21 9HG: not on the flood risk listHP21 9HJ: not on the flood risk listHP21 9HL: not on the flood risk listHP21 9HN: not on the flood risk listHP21 9HP: not on the flood risk listHP21 9HR: not on the flood risk listHP21 9HS: not on the flood risk listHP21 9HT: not on the flood risk listHP21 9HU: not on the flood risk listHP21 9HW: not on the flood risk listHP21 9HX: not on the flood risk listHP21 9HY: not on the flood risk listHP21 9JA: not on the flood risk listHP21 9JB: not on the flood risk listHP21 9JD: not on the flood risk listHP21 9JE: not on the flood risk listHP21 9JF: not on the flood risk listHP21 9JG: not on the flood risk listHP21 9JH: not on the flood risk listHP21 9JJ: not on the flood risk listHP21 9JL: not on the flood risk listHP21 9JN: not on the flood risk listHP21 9JP: not on the flood risk listHP21 9JQ: not on the flood risk listHP21 9JR: not on the flood risk listHP21 9JS: not on the flood risk listHP21 9JW: not on the flood risk listHP21 9LA: not on the flood risk listHP21 9LB: not on the flood risk listHP21 9LJ: not on the flood risk listHP21 9LL: not on the flood risk listHP21 9LN: not on the flood risk listHP21 9LP: not on the flood risk listHP21 9LQ: not on the flood risk listHP21 9LR: not on the flood risk listHP21 9LS: not on the flood risk listHP21 9LT: not on the flood risk listHP21 9LU: not on the flood risk listHP21 9LW: not on the flood risk listHP21 9LX: not on the flood risk listHP21 9LY: not on the flood risk listHP21 9LZ: not on the flood risk listHP21 9NA: not on the flood risk listHP21 9NB: not on the flood risk listHP21 9ND: not on the flood risk listHP21 9NE: not on the flood risk listHP21 9NF: not on the flood risk listHP21 9NH: not on the flood risk listHP21 9NJ: not on the flood risk listHP21 9NL: not on the flood risk listHP21 9NN: not on the flood risk listHP21 9NP: not on the flood risk listHP21 9NR: not on the flood risk listHP21 9NS: not on the flood risk listHP21 9NT: not on the flood risk listHP21 9NU: not on the flood risk listHP21 9NW: not on the flood risk listHP21 9NX: not on the flood risk listHP21 9PA: not on the flood risk listHP21 9PB: not on the flood risk listHP21 9PD: not on the flood risk listHP21 9PH: not on the flood risk listHP21 9PJ: not on the flood risk listHP21 9PL: not on the flood risk listHP21 9PN: not on the flood risk listHP21 9PP: not on the flood risk listHP21 9PR: not on the flood risk listHP21 9PS: not on the flood risk listHP21 9PT: not on the flood risk listHP21 9PU: not on the flood risk listHP21 9PW: not on the flood risk listHP21 9PZ: not on the flood risk listHP21 9QB: not on the flood risk listHP21 9QD: not on the flood risk listHP21 9QE: not on the flood risk listHP21 9QF: not on the flood risk listHP21 9QP: not on the flood risk listHP21 9QR: not on the flood risk listHP21 9QS: not on the flood risk listHP21 9QT: not on the flood risk listHP21 9QU: not on the flood risk listHP21 9QW: not on the flood risk listHP21 9QY: not on the flood risk listHP21 9QZ: not on the flood risk listHP21 9RG: not on the flood risk listHP21 9RH: not on the flood risk listHP21 9RJ: not on the flood risk listHP21 9RL: not on the flood risk listHP21 9RQ: not on the flood risk listHP21 9RR: not on the flood risk listHP21 9RS: not on the flood risk listHP21 9RT: not on the flood risk listHP21 9RU: not on the flood risk listHP21 9RX: not on the flood risk listHP21 9RY: not on the flood risk listHP21 9SH: not on the flood risk listHP21 9SL: not on the flood risk listHP21 9SQ: not on the flood risk listHP21 9TA: not on the flood risk listHP21 9TE: not on the flood risk listHP21 9TF: not on the flood risk listHP21 9TG: not on the flood risk listHP21 9TJ: not on the flood risk listHP21 9TL: not on the flood risk listHP21 9TN: not on the flood risk listHP21 9TQ: not on the flood risk listHP21 9TS: not on the flood risk listHP21 9TW: not on the flood risk listHP21 9TX: not on the flood risk listHP21 9TY: not on the flood risk listHP21 9TZ: not on the flood risk listHP21 9UA: not on the flood risk listHP21 9UB: not on the flood risk listHP21 9UD: not on the flood risk listHP21 9UF: not on the flood risk listHP21 9UG: not on the flood risk listHP21 9UH: not on the flood risk listHP21 9UJ: not on the flood risk listHP21 9UL: not on the flood risk listHP21 9UN: not on the flood risk listHP21 9UP: not on the flood risk listHP21 9UQ: not on the flood risk listHP21 9UR: not on the flood risk listHP21 9UT: not on the flood risk listHP21 9UU: not on the flood risk listHP21 9UW: not on the flood risk listHP21 9UX: not on the flood risk listHP21 9UY: not on the flood risk listHP21 9XA: not on the flood risk listHP21 9XB: not on the flood risk listHP21 9XD: not on the flood risk listHP21 9XE: not on the flood risk listHP21 9XF: not on the flood risk listHP21 9XG: not on the flood risk listHP21 9XH: not on the flood risk listHP21 9XJ: not on the flood risk listHP21 9XL: not on the flood risk listHP21 9XN: not on the flood risk listHP21 9XQ: not on the flood risk listHP21 9XR: not on the flood risk listHP21 9XS: not on the flood risk listHP21 9XT: not on the flood risk listHP21 9XU: not on the flood risk listHP21 9XW: not on the flood risk listHP21 9XX: not on the flood risk listHP21 9XY: not on the flood risk listHP21 9XZ: not on the flood risk listHP21 9YA: not on the flood risk listHP21 9YB: not on the flood risk listHP21 9YD: not on the flood risk listHP21 9YE: not on the flood risk listHP21 9YF: not on the flood risk listHP21 9YG: not on the flood risk listHP21 9YH: not on the flood risk listHP21 9YJ: not on the flood risk listHP21 9YL: not on the flood risk listHP21 9YQ: not on the flood risk listHP21 7BB: very low flood risk onlyHP21 7GQ: very low flood risk onlyHP21 7QG: very low flood risk onlyHP21 7RE: very low flood risk onlyHP21 7RY: very low flood risk onlyHP21 7SD: very low flood risk onlyHP21 8FH: very low flood risk onlyHP21 8HP: very low flood risk onlyHP21 8PB: very low flood risk onlyHP21 8PD: very low flood risk onlyHP21 8PE: very low flood risk onlyHP21 7AF: low flood risk at worstHP21 7FS: low flood risk at worstHP21 7RN: low flood risk at worstHP21 7SA: low flood risk at worstHP21 7SB: low flood risk at worstHP21 7SF: low flood risk at worstHP21 8AE: low flood risk at worstHP21 8DF: low flood risk at worstHP21 8DG: low flood risk at worstHP21 8DR: low flood risk at worstHP21 8DZ: low flood risk at worstHP21 8EA: low flood risk at worstHP21 8EB: low flood risk at worstHP21 8ED: low flood risk at worstHP21 8EN: low flood risk at worstHP21 8FJ: low flood risk at worstHP21 8FN: low flood risk at worstHP21 8FP: low flood risk at worstHP21 8FQ: low flood risk at worstHP21 8FR: low flood risk at worstHP21 8FT: low flood risk at worstHP21 8FU: low flood risk at worstHP21 8FW: low flood risk at worstHP21 8FX: low flood risk at worstHP21 8FZ: low flood risk at worstHP21 8HN: low flood risk at worstHP21 8JL: low flood risk at worstHP21 8JP: low flood risk at worstHP21 8JU: low flood risk at worstHP21 8JX: low flood risk at worstHP21 8LD: low flood risk at worstHP21 8LG: low flood risk at worstHP21 8LJ: low flood risk at worstHP21 8LL: low flood risk at worstHP21 8NB: low flood risk at worstHP21 8ND: low flood risk at worstHP21 8NX: low flood risk at worstHP21 8PA: low flood risk at worstHP21 8PR: low flood risk at worstHP21 8RH: low flood risk at worstHP21 8UU: low flood risk at worstHP21 8UX: low flood risk at worstHP21 8UY: low flood risk at worstHP21 8UZ: low flood risk at worstHP21 8YZ: low flood risk at worstHP21 9TT: low flood risk at worstHP21 7AQ: medium flood risk at worstHP21 8FL: medium flood risk at worstHP21 8HH: medium flood risk at worstHP21 8LF: medium flood risk at worstHP21 8LT: medium flood risk at worstHP21 8LY: medium flood risk at worstHP21 8LZ: medium flood risk at worstHP21 8NA: medium flood risk at worstHP21 8NY: medium flood risk at worstHP21 8NZ: medium flood risk at worstHP21 8PN: medium flood risk at worstHP21 9TU: medium flood risk at worstHP21 7SE: high flood riskHP21 7SH: high flood riskHP21 8DE: high flood riskHP21 8JA: high flood riskHP21 8LE: high flood riskHP21 8LN: high flood riskHP21 8LW: high flood riskHP21 8NU: high flood riskHP21 9BB: high flood risk Aylesbury 11 postcodes at high or medium risk, outlined: this goes to HP21 8LW, the one with most homes and businesses at high risk11 postcodes at high or medium risk Map of every postcode in HP21, by flood risk Of the 725 postcodes in HP21 that ONS places, 9 have a home or business at high risk, 12 are at medium risk at worst, 46 are at low risk at worst, 12 are at very low risk only and 646 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 11 postcodes at high or medium risk. Places named: Aylesbury. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. Aylesbury
  • A home or business at high risk: 9
  • At medium risk at worst: 12
  • At low risk at worst: 46
  • At very low risk only: 12
  • Not on the at-risk list: 646
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 725 postcodes in HP21 that ONS places, 9 have a home or business at high risk, 12 are at medium risk at worst, 46 are at low risk at worst, 12 are at very low risk only and 646 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 51.8051, longitude -0.8059. 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

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

HP21 8LW14 at high riskHP21 8NU8 at high riskHP21 7SH4 at high riskHP21 8LE3 at high riskHP21 8JA3 at high riskHP21 9BB3 at high riskHP21 8LN1 at high riskHP21 7SE1 at high riskHP21 8DE1 at high risk

Where the postcodes at high or medium risk lie together

  • 11 postcodes at high or medium risk, outlined on the map. HP21 8LW, is the one with most homes and businesses at high risk.

What broadband can you get in HP21?

Ofcom reports on 706 of the 725 postcodes in HP21. At 606 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit606 of 706
Postcodes where every home can get superfast692 of 706

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 HP21 at risk of flooding?

79 of the 725 postcodes in HP21 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 152 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 79 of 725 postcodes High: 38Medium: 114Low: 638Very low: 396

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 HP21?

Homes in HP21 sold for a typical £325,000 in the 12 months to August 2026, across 353 sales, no change on the 12 months before, HM Land Registry's figures show.

£325,000 typical price, the 12 months to August 2026
12 months to August 2025
£325,000
12 months to August 2026
£325,000

■ no change on the 12 months before

Detached£520,000 45 sales
Semi-detached£378,750 114 sales
Terraced£305,000 130 sales
Flat or maisonette£181,750 64 sales

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 HP21

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

HP21 7225 postcodesHP21 8247 postcodesHP21 9253 postcodes
UK postcode format explained

Places in HP21

Towns and villages with postcodes in HP21, and how many each has here.

Aylesbury postcodes,725

Who covers HP21

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

  • Aylesbury709
  • Mid Buckinghamshire16

Police force areas

  • Thames Valley725

Next to HP21

HP20 postcode district HP22 postcode district All HP districts Aylesbury postcodes

"Next to" is by number: the districts before and after HP21 in the HP area.

Check a postcode

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