HP18 postcode district: Aylesbury and around

HP18 is a postcode district in England, with 695 postcodes in use in 3 sectors. It has postcodes in Aylesbury, Long Crendon and Stoke Mandeville. It is split between 3 councils: Buckinghamshire (686 postcodes), Cherwell (6) and South Oxfordshire (3). 9 of its 695 postcodes are in Oxfordshire. ONS lists no county for the other 686.

Postcodes in use
695
Sectors
3
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 HP18, by flood risk

Map of every postcode in HP18, by flood risk Of the 695 postcodes in HP18 that ONS places, 23 have a home or business at high risk, 13 are at medium risk at worst, 27 are at low risk at worst and 632 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 13 postcodes at high or medium risk. Places named: Aylesbury, Haddenham, Stoke Mandeville, Long Crendon. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A41A413A4129M40 HP18 0AA: not on the flood risk listHP18 0AB: not on the flood risk listHP18 0AD: not on the flood risk listHP18 0AE: not on the flood risk listHP18 0AF: not on the flood risk listHP18 0AG: not on the flood risk listHP18 0AH: not on the flood risk listHP18 0AJ: not on the flood risk listHP18 0AP: not on the flood risk listHP18 0AR: not on the flood risk listHP18 0AS: not on the flood risk listHP18 0AW: not on the flood risk listHP18 0AY: not on the flood risk listHP18 0AZ: not on the flood risk listHP18 0BF: not on the flood risk listHP18 0BG: not on the flood risk listHP18 0BH: not on the flood risk listHP18 0BJ: not on the flood risk listHP18 0BL: not on the flood risk listHP18 0BN: not on the flood risk listHP18 0BQ: not on the flood risk listHP18 0BW: not on the flood risk listHP18 0BY: not on the flood risk listHP18 0DB: not on the flood risk listHP18 0DG: not on the flood risk listHP18 0DH: not on the flood risk listHP18 0DP: not on the flood risk listHP18 0DS: not on the flood risk listHP18 0DT: not on the flood risk listHP18 0DU: not on the flood risk listHP18 0DX: not on the flood risk listHP18 0DY: not on the flood risk listHP18 0DZ: not on the flood risk listHP18 0EA: not on the flood risk listHP18 0EB: not on the flood risk listHP18 0EE: not on the flood risk listHP18 0EF: not on the flood risk listHP18 0EG: not on the flood risk listHP18 0EJ: not on the flood risk listHP18 0EL: not on the flood risk listHP18 0EP: not on the flood risk listHP18 0EQ: not on the flood risk listHP18 0ER: not on the flood risk listHP18 0ES: not on the flood risk listHP18 0ET: not on the flood risk listHP18 0EU: not on the flood risk listHP18 0EW: not on the flood risk listHP18 0FA: not on the flood risk listHP18 0FY: not on the flood risk listHP18 0GA: not on the flood risk listHP18 0GJ: not on the flood risk listHP18 0GN: not on the flood risk listHP18 0GU: not on the flood risk listHP18 0HA: not on the flood risk listHP18 0HB: not on the flood risk listHP18 0HD: not on the flood risk listHP18 0HF: not on the flood risk listHP18 0HG: not on the flood risk listHP18 0HH: not on the flood risk listHP18 0HL: not on the flood risk listHP18 0HQ: not on the flood risk listHP18 0HS: not on the flood risk listHP18 0HT: not on the flood risk listHP18 0JA: not on the flood risk listHP18 0JD: not on the flood risk listHP18 0JF: not on the flood risk listHP18 0JH: not on the flood risk listHP18 0JJ: not on the flood risk listHP18 0JL: not on the flood risk listHP18 0JN: not on the flood risk listHP18 0JR: not on the flood risk listHP18 0JS: not on the flood risk listHP18 0JT: not on the flood risk listHP18 0JU: not on the flood risk listHP18 0JW: not on the flood risk listHP18 0JX: not on the flood risk listHP18 0JZ: not on the flood risk listHP18 0LA: not on the flood risk listHP18 0LB: not on the flood risk listHP18 0LE: not on the flood risk listHP18 0LL: not on the flood risk listHP18 0LP: not on the flood risk listHP18 0LR: not on the flood risk listHP18 0LS: not on the flood risk listHP18 0LY: not on the flood risk listHP18 0NB: not on the flood risk listHP18 0ND: not on the flood risk listHP18 0NE: not on the flood risk listHP18 0NF: not on the flood risk listHP18 0NG: not on the flood risk listHP18 0NH: not on the flood risk listHP18 0NJ: not on the flood risk listHP18 0NS: not on the flood risk listHP18 0NX: not on the flood risk listHP18 0NY: not on the flood risk listHP18 0PA: not on the flood risk listHP18 0PB: not on the flood risk listHP18 0PE: not on the flood risk listHP18 0PF: not on the flood risk listHP18 0PG: not on the flood risk listHP18 0PJ: not on the flood risk listHP18 0PL: not on the flood risk listHP18 0PN: not on the flood risk listHP18 0PR: not on the flood risk listHP18 0PS: not on the flood risk listHP18 0PT: not on the flood risk listHP18 0PX: not on the flood risk listHP18 0PY: not on the flood risk listHP18 0PZ: not on the flood risk listHP18 0QA: not on the flood risk listHP18 0QB: not on the flood risk listHP18 0QD: not on the flood risk listHP18 0QE: not on the flood risk listHP18 0QF: not on the flood risk listHP18 0QG: not on the flood risk listHP18 0QH: not on the flood risk listHP18 0QJ: not on the flood risk listHP18 0QL: not on the flood risk listHP18 0QN: not on the flood risk listHP18 0QQ: not on the flood risk listHP18 0QR: not on the flood risk listHP18 0QU: not on the flood risk listHP18 0QW: not on the flood risk listHP18 0QX: not on the flood risk listHP18 0QY: not on the flood risk listHP18 0RA: not on the flood risk listHP18 0RB: not on the flood risk listHP18 0RD: not on the flood risk listHP18 0RE: not on the flood risk listHP18 0RG: not on the flood risk listHP18 0RH: not on the flood risk listHP18 0RL: not on the flood risk listHP18 0RN: not on the flood risk listHP18 0RP: not on the flood risk listHP18 0RR: not on the flood risk listHP18 0RS: not on the flood risk listHP18 0RT: not on the flood risk listHP18 0RU: not on the flood risk listHP18 0RW: not on the flood risk listHP18 0RX: not on the flood risk listHP18 0RY: not on the flood risk listHP18 0RZ: not on the flood risk listHP18 0SA: not on the flood risk listHP18 0SB: not on the flood risk listHP18 0SD: not on the flood risk listHP18 0SE: not on the flood risk listHP18 0SF: not on the flood risk listHP18 0SH: not on the flood risk listHP18 0SJ: not on the flood risk listHP18 0SN: not on the flood risk listHP18 0SQ: not on the flood risk listHP18 0SU: not on the flood risk listHP18 0SX: not on the flood risk listHP18 0SY: not on the flood risk listHP18 0SZ: not on the flood risk listHP18 0TA: not on the flood risk listHP18 0TD: not on the flood risk listHP18 0TF: not on the flood risk listHP18 0TH: not on the flood risk listHP18 0TJ: not on the flood risk listHP18 0TN: not on the flood risk listHP18 0TP: not on the flood risk listHP18 0TR: not on the flood risk listHP18 0TS: not on the flood risk listHP18 0TT: not on the flood risk listHP18 0TX: not on the flood risk listHP18 0UA: not on the flood risk listHP18 0UB: not on the flood risk listHP18 0UE: not on the flood risk listHP18 0UU: not on the flood risk listHP18 0UX: not on the flood risk listHP18 0WA: not on the flood risk listHP18 0WB: not on the flood risk listHP18 0WL: not on the flood risk listHP18 0WS: not on the flood risk listHP18 0WW: not on the flood risk listHP18 0XJ: not on the flood risk listHP18 0YA: not on the flood risk listHP18 0YS: not on the flood risk listHP18 0ZU: not on the flood risk listHP18 1AA: not on the flood risk listHP18 1AB: not on the flood risk listHP18 1AR: not on the flood risk listHP18 9AA: not on the flood risk listHP18 9AF: not on the flood risk listHP18 9AH: not on the flood risk listHP18 9AL: not on the flood risk listHP18 9AN: not on the flood risk listHP18 9AP: not on the flood risk listHP18 9AQ: not on the flood risk listHP18 9AR: not on the flood risk listHP18 9AS: not on the flood risk listHP18 9AT: not on the flood risk listHP18 9AW: not on the flood risk listHP18 9AX: not on the flood risk listHP18 9BA: not on the flood risk listHP18 9BB: not on the flood risk listHP18 9BE: not on the flood risk listHP18 9BF: not on the flood risk listHP18 9BG: not on the flood risk listHP18 9BQ: not on the flood risk listHP18 9BW: not on the flood risk listHP18 9BY: not on the flood risk listHP18 9BZ: not on the flood risk listHP18 9DA: not on the flood risk listHP18 9DB: not on the flood risk listHP18 9DE: not on the flood risk listHP18 9DF: not on the flood risk listHP18 9DH: not on the flood risk listHP18 9DN: not on the flood risk listHP18 9DQ: not on the flood risk listHP18 9DZ: not on the flood risk listHP18 9ED: not on the flood risk listHP18 9EF: not on the flood risk listHP18 9EG: not on the flood risk listHP18 9EN: not on the flood risk listHP18 9EP: not on the flood risk listHP18 9EQ: not on the flood risk listHP18 9ER: not on the flood risk listHP18 9ES: not on the flood risk listHP18 9ET: not on the flood risk listHP18 9EU: not on the flood risk listHP18 9EX: not on the flood risk listHP18 9EY: not on the flood risk listHP18 9FE: not on the flood risk listHP18 9FF: not on the flood risk listHP18 9FG: not on the flood risk listHP18 9FY: not on the flood risk listHP18 9GE: not on the flood risk listHP18 9GF: not on the flood risk listHP18 9GG: not on the flood risk listHP18 9GH: not on the flood risk listHP18 9GJ: not on the flood risk listHP18 9GL: not on the flood risk listHP18 9GN: not on the flood risk listHP18 9GP: not on the flood risk listHP18 9GR: not on the flood risk listHP18 9GS: not on the flood risk listHP18 9HA: not on the flood risk listHP18 9HB: not on the flood risk listHP18 9HD: not on the flood risk listHP18 9HG: not on the flood risk listHP18 9HL: not on the flood risk listHP18 9HP: not on the flood risk listHP18 9HS: not on the flood risk listHP18 9HY: not on the flood risk listHP18 9JA: not on the flood risk listHP18 9JF: not on the flood risk listHP18 9JG: not on the flood risk listHP18 9JN: not on the flood risk listHP18 9JP: not on the flood risk listHP18 9JR: not on the flood risk listHP18 9JT: not on the flood risk listHP18 9JW: not on the flood risk listHP18 9JX: not on the flood risk listHP18 9JY: not on the flood risk listHP18 9JZ: not on the flood risk listHP18 9LD: not on the flood risk listHP18 9LJ: not on the flood risk listHP18 9LL: not on the flood risk listHP18 9LN: not on the flood risk listHP18 9LP: not on the flood risk listHP18 9LQ: not on the flood risk listHP18 9LR: not on the flood risk listHP18 9LS: not on the flood risk listHP18 9LT: not on the flood risk listHP18 9LU: not on the flood risk listHP18 9LX: not on the flood risk listHP18 9LZ: not on the flood risk listHP18 9NB: not on the flood risk listHP18 9ND: not on the flood risk listHP18 9NE: not on the flood risk listHP18 9NG: not on the flood risk listHP18 9NJ: not on the flood risk listHP18 9NP: not on the flood risk listHP18 9NQ: not on the flood risk listHP18 9NR: not on the flood risk listHP18 9PB: not on the flood risk listHP18 9PD: not on the flood risk listHP18 9PG: not on the flood risk listHP18 9PL: not on the flood risk listHP18 9PN: not on the flood risk listHP18 9PU: not on the flood risk listHP18 9PW: not on the flood risk listHP18 9PX: not on the flood risk listHP18 9PY: not on the flood risk listHP18 9PZ: not on the flood risk listHP18 9QD: not on the flood risk listHP18 9QE: not on the flood risk listHP18 9QF: not on the flood risk listHP18 9QH: not on the flood risk listHP18 9QJ: not on the flood risk listHP18 9QN: not on the flood risk listHP18 9QQ: not on the flood risk listHP18 9QX: not on the flood risk listHP18 9QZ: not on the flood risk listHP18 9RB: not on the flood risk listHP18 9RD: not on the flood risk listHP18 9RG: not on the flood risk listHP18 9RP: not on the flood risk listHP18 9RQ: not on the flood risk listHP18 9RR: not on the flood risk listHP18 9RT: not on the flood risk listHP18 9RX: not on the flood risk listHP18 9RZ: not on the flood risk listHP18 9SA: not on the flood risk listHP18 9SB: not on the flood risk listHP18 9SD: not on the flood risk listHP18 9SE: not on the flood risk listHP18 9SG: not on the flood risk listHP18 9SH: not on the flood risk listHP18 9SJ: not on the flood risk listHP18 9SL: not on the flood risk listHP18 9SN: not on the flood risk listHP18 9ST: not on the flood risk listHP18 9SY: not on the flood risk listHP18 9SZ: not on the flood risk listHP18 9TE: not on the flood risk listHP18 9TH: not on the flood risk listHP18 9TJ: not on the flood risk listHP18 9TL: not on the flood risk listHP18 9TN: not on the flood risk listHP18 9TP: not on the flood risk listHP18 9TU: not on the flood risk listHP18 9TX: not on the flood risk listHP18 9TY: not on the flood risk listHP18 9TZ: not on the flood risk listHP18 9UA: not on the flood risk listHP18 9UB: not on the flood risk listHP18 9UD: not on the flood risk listHP18 9UE: not on the flood risk listHP18 9UH: not on the flood risk listHP18 9UJ: not on the flood risk listHP18 9UP: not on the flood risk listHP18 9UR: not on the flood risk listHP18 9UT: not on the flood risk listHP18 9UW: not on the flood risk listHP18 9UX: not on the flood risk listHP18 9UY: not on the flood risk listHP18 9UZ: not on the flood risk listHP18 9XA: not on the flood risk listHP18 9XB: not on the flood risk listHP18 9XD: not on the flood risk listHP18 9XE: not on the flood risk listHP18 9XF: not on the flood risk listHP18 9XH: not on the flood risk listHP18 9XX: not on the flood risk listHP18 0FG: low flood risk at worstHP18 0GS: low flood risk at worstHP18 0UR: low flood risk at worstHP18 0UZ: low flood risk at worstHP18 0WN: low flood risk at worstHP18 0WP: low flood risk at worstHP18 0WQ: low flood risk at worstHP18 0YZ: low flood risk at worstHP18 0YQ: low flood risk at worstHP18 1AT: low flood risk at worstHP18 9HU: low flood risk at worstHP18 9JB: low flood risk at worstHP18 9LA: low flood risk at worstHP18 9NF: low flood risk at worstHP18 9NH: low flood risk at worstHP18 9PA: low flood risk at worstHP18 9SF: low flood risk at worstHP18 9UN: low flood risk at worstHP18 0DN: medium flood risk at worstHP18 0FJ: medium flood risk at worstHP18 0RF: medium flood risk at worstHP18 1AJ: medium flood risk at worstHP18 9HN: medium flood risk at worstHP18 9EW: medium flood risk at worstHP18 9NY: medium flood risk at worstHP18 9PJ: medium flood risk at worstHP18 0BP: high flood riskHP18 0GT: high flood riskHP18 0QS: high flood riskHP18 0FF: high flood riskHP18 0FW: high flood riskHP18 0HP: high flood riskHP18 0PU: high flood riskHP18 0XP: high flood riskHP18 0XB: high flood riskHP18 1AW: high flood riskHP18 9HF: high flood riskHP18 9HJ: high flood riskHP18 9HR: high flood riskHP18 9HZ: high flood riskHP18 9JE: high flood riskHP18 9NT: high flood riskHP18 9NZ: high flood riskHP18 9PQ: high flood riskHP18 9UL: high flood riskHP18 9UU: high flood risk AylesburyHaddenhamStoke MandevilleLong Crendon 13 postcodes at high or medium risk, outlined: this goes to HP18 0FF, the one with most homes and businesses at high risk13 postcodes at high or medium risk Map of every postcode in HP18, by flood risk Of the 695 postcodes in HP18 that ONS places, 23 have a home or business at high risk, 13 are at medium risk at worst, 27 are at low risk at worst and 632 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 13 postcodes at high or medium risk. Places named: Aylesbury, Haddenham, Stoke Mandeville, Long Crendon. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 5 km. A413 AylesburyHaddenhamStoke MandevilleLong Crendon
  • A home or business at high risk: 23
  • At medium risk at worst: 13
  • At low risk at worst: 27
  • At very low risk only: 0
  • Not on the at-risk list: 632
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 695 postcodes in HP18 that ONS places, 23 have a home or business at high risk, 13 are at medium risk at worst, 27 are at low risk at worst and 632 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 200 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 51.8200, longitude -0.9680. 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

23 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.

HP18 0FF15 at high riskHP18 1AP9 at high riskHP18 0GT5 at high riskHP18 1BA4 at high riskHP18 9JE4 at high riskHP18 9UL4 at high riskHP18 1AZ3 at high riskHP18 9PQ3 at high riskHP18 0BP2 at high riskHP18 0XB2 at high riskHP18 0XP2 at high riskHP18 9HF2 at high risk

Where the postcodes at high or medium risk lie together

  • 13 postcodes at high or medium risk, outlined on the map. HP18 0FF, is the one with most homes and businesses at high risk.

What broadband can you get in HP18?

Ofcom reports on 687 of the 695 postcodes in HP18. At 428 of them every home and business can get gigabit broadband, and at 24 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit428 of 687
Postcodes where every home can get superfast553 of 687
Postcodes where some cannot get decent broadband24 of 687

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 HP18 at risk of flooding?

63 of the 695 postcodes in HP18 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 149 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 63 of 695 postcodes High: 67Medium: 82Low: 352Very low: 7

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 HP18?

Homes in HP18 sold for a typical £403,750 in the 12 months to August 2026, across 228 sales, up 3.5% on the 12 months before, HM Land Registry's figures show.

£403,750 typical price, the 12 months to August 2026
£390,000 12 months to August 2025
▲ up 3.5% on the 12 months before
  • Detached £625,000 75 sales
  • Semi-detached £392,500 72 sales
  • Terraced £360,000 57 sales
  • Flat or maisonette £204,000 24 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 HP18

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

HP18 0380 postcodesHP18 123 postcodesHP18 9292 postcodes
UK postcode format explained

Places in HP18

Towns and villages with postcodes in HP18, and how many each has here.

Aylesbury postcodes,144Long Crendon postcodes,64Stoke Mandeville postcodes,2

Who covers HP18

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

  • Mid Buckinghamshire684
  • Bicester and Woodstock6
  • Henley and Thame3
  • Buckingham and Bletchley2

Police force areas

  • Thames Valley695

Next to HP18

HP17 postcode district HP19 postcode district All HP districts Aylesbury postcodes

"Next to" is by number: the districts before and after HP18 in the HP area.

Check a postcode

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