PO3 postcode district: Portsmouth and around

PO3 is a postcode district in England, with 441 postcodes in use in 2 sectors. It has postcodes in Portsmouth. Its council is Portsmouth.

Postcodes in use
441
Sectors
2
Council
Portsmouth
Places
Portsmouth

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

Every postcode in PO3, by flood risk

Map of every postcode in PO3, by flood risk Of the 441 postcodes in PO3 that ONS places, 38 have a home or business at high risk, 22 are at medium risk at worst, 60 are at low risk at worst, 110 are at very low risk only and 211 are not on the Environment Agency's at-risk list. 3 groups of postcodes at high or medium risk are outlined: 24 postcodes at high or medium risk; 10 postcodes at high or medium risk; 9 postcodes at high or medium risk. Places named: Portsmouth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. M275A27A2030 PO3 5AA: not on the flood risk listPO3 5AB: not on the flood risk listPO3 5AD: not on the flood risk listPO3 5AF: not on the flood risk listPO3 5AG: not on the flood risk listPO3 5AH: not on the flood risk listPO3 5AJ: not on the flood risk listPO3 5AL: not on the flood risk listPO3 5AN: not on the flood risk listPO3 5AP: not on the flood risk listPO3 5AQ: not on the flood risk listPO3 5AR: not on the flood risk listPO3 5AS: not on the flood risk listPO3 5AT: not on the flood risk listPO3 5AU: not on the flood risk listPO3 5AW: not on the flood risk listPO3 5AX: not on the flood risk listPO3 5AY: not on the flood risk listPO3 5BA: not on the flood risk listPO3 5BB: not on the flood risk listPO3 5BD: not on the flood risk listPO3 5BE: not on the flood risk listPO3 5BG: not on the flood risk listPO3 5BH: not on the flood risk listPO3 5BQ: not on the flood risk listPO3 5BS: not on the flood risk listPO3 5BT: not on the flood risk listPO3 5BW: not on the flood risk listPO3 5BX: not on the flood risk listPO3 5BY: not on the flood risk listPO3 5BZ: not on the flood risk listPO3 5DA: not on the flood risk listPO3 5DB: not on the flood risk listPO3 5DD: not on the flood risk listPO3 5DE: not on the flood risk listPO3 5DF: not on the flood risk listPO3 5DG: not on the flood risk listPO3 5DH: not on the flood risk listPO3 5DJ: not on the flood risk listPO3 5DL: not on the flood risk listPO3 5DN: not on the flood risk listPO3 5DP: not on the flood risk listPO3 5DR: not on the flood risk listPO3 5DS: not on the flood risk listPO3 5DT: not on the flood risk listPO3 5DU: not on the flood risk listPO3 5EE: not on the flood risk listPO3 5EF: not on the flood risk listPO3 5EG: not on the flood risk listPO3 5EL: not on the flood risk listPO3 5EN: not on the flood risk listPO3 5EQ: not on the flood risk listPO3 5ET: not on the flood risk listPO3 5EU: not on the flood risk listPO3 5EX: not on the flood risk listPO3 5EY: not on the flood risk listPO3 5EZ: not on the flood risk listPO3 5FG: not on the flood risk listPO3 5FJ: not on the flood risk listPO3 5FL: not on the flood risk listPO3 5FN: not on the flood risk listPO3 5FR: not on the flood risk listPO3 5GA: not on the flood risk listPO3 5GR: not on the flood risk listPO3 5HB: not on the flood risk listPO3 5HD: not on the flood risk listPO3 5HE: not on the flood risk listPO3 5HG: not on the flood risk listPO3 5LL: not on the flood risk listPO3 5NQ: not on the flood risk listPO3 5RW: not on the flood risk listPO3 5SJ: not on the flood risk listPO3 5SX: not on the flood risk listPO3 5TH: not on the flood risk listPO3 6AA: not on the flood risk listPO3 6AB: not on the flood risk listPO3 6AD: not on the flood risk listPO3 6AE: not on the flood risk listPO3 6AH: not on the flood risk listPO3 6AJ: not on the flood risk listPO3 6AL: not on the flood risk listPO3 6AN: not on the flood risk listPO3 6AP: not on the flood risk listPO3 6AQ: not on the flood risk listPO3 6AR: not on the flood risk listPO3 6AT: not on the flood risk listPO3 6AU: not on the flood risk listPO3 6AX: not on the flood risk listPO3 6AY: not on the flood risk listPO3 6AZ: not on the flood risk listPO3 6BA: not on the flood risk listPO3 6BB: not on the flood risk listPO3 6BD: not on the flood risk listPO3 6BE: not on the flood risk listPO3 6BG: not on the flood risk listPO3 6BH: not on the flood risk listPO3 6BL: not on the flood risk listPO3 6BN: not on the flood risk listPO3 6BP: not on the flood risk listPO3 6BQ: not on the flood risk listPO3 6BS: not on the flood risk listPO3 6BU: not on the flood risk listPO3 6BW: not on the flood risk listPO3 6BX: not on the flood risk listPO3 6BY: not on the flood risk listPO3 6BZ: not on the flood risk listPO3 6DA: not on the flood risk listPO3 6DD: not on the flood risk listPO3 6DE: not on the flood risk listPO3 6DF: not on the flood risk listPO3 6DG: not on the flood risk listPO3 6DH: not on the flood risk listPO3 6DL: not on the flood risk listPO3 6DN: not on the flood risk listPO3 6DS: not on the flood risk listPO3 6DT: not on the flood risk listPO3 6DU: not on the flood risk listPO3 6DW: not on the flood risk listPO3 6EA: not on the flood risk listPO3 6EB: not on the flood risk listPO3 6ED: not on the flood risk listPO3 6EF: not on the flood risk listPO3 6EN: not on the flood risk listPO3 6ES: not on the flood risk listPO3 6EW: not on the flood risk listPO3 6EX: not on the flood risk listPO3 6EY: not on the flood risk listPO3 6EZ: not on the flood risk listPO3 6FB: not on the flood risk listPO3 6FD: not on the flood risk listPO3 6FE: not on the flood risk listPO3 6FF: not on the flood risk listPO3 6FG: not on the flood risk listPO3 6FL: not on the flood risk listPO3 6FP: not on the flood risk listPO3 6FQ: not on the flood risk listPO3 6FR: not on the flood risk listPO3 6FS: not on the flood risk listPO3 6FT: not on the flood risk listPO3 6FU: not on the flood risk listPO3 6FW: not on the flood risk listPO3 6FX: not on the flood risk listPO3 6FY: not on the flood risk listPO3 6FZ: not on the flood risk listPO3 6GA: not on the flood risk listPO3 6GB: not on the flood risk listPO3 6GD: not on the flood risk listPO3 6GE: not on the flood risk listPO3 6GF: not on the flood risk listPO3 6GG: not on the flood risk listPO3 6GH: not on the flood risk listPO3 6GJ: not on the flood risk listPO3 6GL: not on the flood risk listPO3 6GN: not on the flood risk listPO3 6GP: not on the flood risk listPO3 6GQ: not on the flood risk listPO3 6GR: not on the flood risk listPO3 6GS: not on the flood risk listPO3 6GT: not on the flood risk listPO3 6GU: not on the flood risk listPO3 6GW: not on the flood risk listPO3 6GX: not on the flood risk listPO3 6GY: not on the flood risk listPO3 6GZ: not on the flood risk listPO3 6HA: not on the flood risk listPO3 6HB: not on the flood risk listPO3 6HD: not on the flood risk listPO3 6HE: not on the flood risk listPO3 6HF: not on the flood risk listPO3 6HG: not on the flood risk listPO3 6HH: not on the flood risk listPO3 6HJ: not on the flood risk listPO3 6HL: not on the flood risk listPO3 6HN: not on the flood risk listPO3 6HP: not on the flood risk listPO3 6HQ: not on the flood risk listPO3 6HW: not on the flood risk listPO3 6JE: not on the flood risk listPO3 6JF: not on the flood risk listPO3 6JG: not on the flood risk listPO3 6JT: not on the flood risk listPO3 6JU: not on the flood risk listPO3 6JX: not on the flood risk listPO3 6JY: not on the flood risk listPO3 6JZ: not on the flood risk listPO3 6LA: not on the flood risk listPO3 6LB: not on the flood risk listPO3 6LD: not on the flood risk listPO3 6LE: not on the flood risk listPO3 6LJ: not on the flood risk listPO3 6LN: not on the flood risk listPO3 6LR: not on the flood risk listPO3 6LT: not on the flood risk listPO3 6LU: not on the flood risk listPO3 6LW: not on the flood risk listPO3 6NE: not on the flood risk listPO3 6NG: not on the flood risk listPO3 6NH: not on the flood risk listPO3 6RB: not on the flood risk listPO3 5BJ: very low flood risk onlyPO3 5BL: very low flood risk onlyPO3 5BN: very low flood risk onlyPO3 5BP: very low flood risk onlyPO3 5BU: very low flood risk onlyPO3 5EP: very low flood risk onlyPO3 5ES: very low flood risk onlyPO3 5FE: very low flood risk onlyPO3 5FP: very low flood risk onlyPO3 5FT: very low flood risk onlyPO3 5FU: very low flood risk onlyPO3 5FX: very low flood risk onlyPO3 5GE: very low flood risk onlyPO3 5GQ: very low flood risk onlyPO3 5JH: very low flood risk onlyPO3 5JS: very low flood risk onlyPO3 5JW: very low flood risk onlyPO3 5LB: very low flood risk onlyPO3 5LP: very low flood risk onlyPO3 5NA: very low flood risk onlyPO3 5NB: very low flood risk onlyPO3 5NH: very low flood risk onlyPO3 5NJ: very low flood risk onlyPO3 5NN: very low flood risk onlyPO3 5PE: very low flood risk onlyPO3 5PF: very low flood risk onlyPO3 5PL: very low flood risk onlyPO3 5PR: very low flood risk onlyPO3 5PS: very low flood risk onlyPO3 5QD: very low flood risk onlyPO3 5QN: very low flood risk onlyPO3 5QR: very low flood risk onlyPO3 5QW: very low flood risk onlyPO3 5RF: very low flood risk onlyPO3 5RJ: very low flood risk onlyPO3 5RQ: very low flood risk onlyPO3 5RR: very low flood risk onlyPO3 5RS: very low flood risk onlyPO3 5RU: very low flood risk onlyPO3 5RX: very low flood risk onlyPO3 5SA: very low flood risk onlyPO3 5SH: very low flood risk onlyPO3 5SL: very low flood risk onlyPO3 5SP: very low flood risk onlyPO3 5TU: very low flood risk onlyPO3 5TY: very low flood risk onlyPO3 5UT: very low flood risk onlyPO3 5UW: very low flood risk onlyPO3 5XF: very low flood risk onlyPO3 5XG: very low flood risk onlyPO3 5XH: very low flood risk onlyPO3 5XQ: very low flood risk onlyPO3 5XR: very low flood risk onlyPO3 5XX: very low flood risk onlyPO3 5YB: very low flood risk onlyPO3 6BT: very low flood risk onlyPO3 6DJ: very low flood risk onlyPO3 6DX: very low flood risk onlyPO3 6DY: very low flood risk onlyPO3 6DZ: very low flood risk onlyPO3 6EH: very low flood risk onlyPO3 6EJ: very low flood risk onlyPO3 6EQ: very low flood risk onlyPO3 6FA: very low flood risk onlyPO3 6FH: very low flood risk onlyPO3 6HS: very low flood risk onlyPO3 6HT: very low flood risk onlyPO3 6HU: very low flood risk onlyPO3 6HX: very low flood risk onlyPO3 6HY: very low flood risk onlyPO3 6HZ: very low flood risk onlyPO3 6JA: very low flood risk onlyPO3 6JD: very low flood risk onlyPO3 6JH: very low flood risk onlyPO3 6JL: very low flood risk onlyPO3 6JN: very low flood risk onlyPO3 6JQ: very low flood risk onlyPO3 6LG: very low flood risk onlyPO3 6LH: very low flood risk onlyPO3 6LL: very low flood risk onlyPO3 6LP: very low flood risk onlyPO3 6LY: very low flood risk onlyPO3 6LZ: very low flood risk onlyPO3 6NA: very low flood risk onlyPO3 6NB: very low flood risk onlyPO3 6ND: very low flood risk onlyPO3 6NF: very low flood risk onlyPO3 6NJ: very low flood risk onlyPO3 6NL: very low flood risk onlyPO3 6NN: very low flood risk onlyPO3 6NP: very low flood risk onlyPO3 6NR: very low flood risk onlyPO3 6NS: very low flood risk onlyPO3 6NT: very low flood risk onlyPO3 6NU: very low flood risk onlyPO3 6PB: very low flood risk onlyPO3 6PD: very low flood risk onlyPO3 6PG: very low flood risk onlyPO3 6PH: very low flood risk onlyPO3 6PJ: very low flood risk onlyPO3 6PL: very low flood risk onlyPO3 6PN: very low flood risk onlyPO3 6PP: very low flood risk onlyPO3 6PQ: very low flood risk onlyPO3 6PS: very low flood risk onlyPO3 6PW: very low flood risk onlyPO3 5DX: low flood risk at worstPO3 5DY: low flood risk at worstPO3 5DZ: low flood risk at worstPO3 5EH: low flood risk at worstPO3 5EJ: low flood risk at worstPO3 5ER: low flood risk at worstPO3 5EW: low flood risk at worstPO3 5FF: low flood risk at worstPO3 5FS: low flood risk at worstPO3 5FY: low flood risk at worstPO3 5FZ: low flood risk at worstPO3 5GD: low flood risk at worstPO3 5HJ: low flood risk at worstPO3 5HL: low flood risk at worstPO3 5HS: low flood risk at worstPO3 5HT: low flood risk at worstPO3 5HX: low flood risk at worstPO3 5HY: low flood risk at worstPO3 5HZ: low flood risk at worstPO3 5JA: low flood risk at worstPO3 5JB: low flood risk at worstPO3 5JD: low flood risk at worstPO3 5JE: low flood risk at worstPO3 5JF: low flood risk at worstPO3 5JP: low flood risk at worstPO3 5JT: low flood risk at worstPO3 5JZ: low flood risk at worstPO3 5LA: low flood risk at worstPO3 5LD: low flood risk at worstPO3 5LE: low flood risk at worstPO3 5LF: low flood risk at worstPO3 5LG: low flood risk at worstPO3 5LN: low flood risk at worstPO3 5LR: low flood risk at worstPO3 5LS: low flood risk at worstPO3 5LT: low flood risk at worstPO3 5LU: low flood risk at worstPO3 5LW: low flood risk at worstPO3 5LX: low flood risk at worstPO3 5PQ: low flood risk at worstPO3 5PJ: low flood risk at worstPO3 5PU: low flood risk at worstPO3 5QY: low flood risk at worstPO3 5QZ: low flood risk at worstPO3 5TA: low flood risk at worstPO3 5TN: low flood risk at worstPO3 5TW: low flood risk at worstPO3 5TX: low flood risk at worstPO3 5TZ: low flood risk at worstPO3 5UB: low flood risk at worstPO3 5UH: low flood risk at worstPO3 5UJ: low flood risk at worstPO3 5UN: low flood risk at worstPO3 5UR: low flood risk at worstPO3 5UU: low flood risk at worstPO3 5UX: low flood risk at worstPO3 5XE: low flood risk at worstPO3 5XU: low flood risk at worstPO3 6EG: low flood risk at worstPO3 5GP: medium flood risk at worstPO3 5NU: medium flood risk at worstPO3 5RA: medium flood risk at worstPO3 5TB: medium flood risk at worstPO3 5TE: medium flood risk at worstPO3 5TJ: medium flood risk at worstPO3 5TL: medium flood risk at worstPO3 5TP: medium flood risk at worstPO3 5TR: medium flood risk at worstPO3 5TS: medium flood risk at worstPO3 5UA: medium flood risk at worstPO3 5UD: medium flood risk at worstPO3 5UE: medium flood risk at worstPO3 5UF: medium flood risk at worstPO3 5UG: medium flood risk at worstPO3 5UQ: medium flood risk at worstPO3 5US: medium flood risk at worstPO3 5UZ: medium flood risk at worstPO3 5XA: medium flood risk at worstPO3 5XB: medium flood risk at worstPO3 5XD: medium flood risk at worstPO3 6PZ: medium flood risk at worstPO3 5FH: high flood riskPO3 5HH: high flood riskPO3 5HU: high flood riskPO3 5JJ: high flood riskPO3 5LY: high flood riskPO3 5LZ: high flood riskPO3 5ND: high flood riskPO3 5NL: high flood riskPO3 5NP: high flood riskPO3 5NR: high flood riskPO3 5NS: high flood riskPO3 5NX: high flood riskPO3 5NY: high flood riskPO3 5PA: high flood riskPO3 5QA: high flood riskPO3 5QG: high flood riskPO3 5QH: high flood riskPO3 5QL: high flood riskPO3 5QP: high flood riskPO3 5QQ: high flood riskPO3 5QS: high flood riskPO3 5QT: high flood riskPO3 5RB: high flood riskPO3 5RD: high flood riskPO3 5RN: high flood riskPO3 5RY: high flood riskPO3 5RZ: high flood riskPO3 5SD: high flood riskPO3 5SF: high flood riskPO3 5TF: high flood riskPO3 5TG: high flood riskPO3 5TQ: high flood riskPO3 5UL: high flood riskPO3 5UP: high flood riskPO3 5UY: high flood riskPO3 5XT: high flood riskPO3 6QA: high flood riskPO3 6QB: high flood risk Portsmouth 24 postcodes at high or medium risk, outlined: this goes to PO3 5UL, the one with most homes and businesses at high risk24 postcodes at high or medium risk10 postcodes at high or medium risk, outlined: this goes to PO3 5NX, the one with most homes and businesses at high risk10 postcodes at high or medium risk9 postcodes at high or medium risk, outlined: this goes to PO3 5QT, the one with most homes and businesses at high risk9 postcodes at high or medium risk Map of every postcode in PO3, by flood risk Of the 441 postcodes in PO3 that ONS places, 38 have a home or business at high risk, 22 are at medium risk at worst, 60 are at low risk at worst, 110 are at very low risk only and 211 are not on the Environment Agency's at-risk list. 3 groups of postcodes at high or medium risk are outlined: 24 postcodes at high or medium risk; 10 postcodes at high or medium risk; 9 postcodes at high or medium risk. Places named: Portsmouth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A3A2047A27 Portsmouth
  • A home or business at high risk: 38
  • At medium risk at worst: 22
  • At low risk at worst: 60
  • At very low risk only: 110
  • Not on the at-risk list: 211
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 441 postcodes in PO3 that ONS places, 38 have a home or business at high risk, 22 are at medium risk at worst, 60 are at low risk at worst, 110 are at very low risk only and 211 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 50.8161, longitude -1.0592. 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

38 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.

PO3 6QB74 at high riskPO3 5QT42 at high riskPO3 5NX19 at high riskPO3 5RY18 at high riskPO3 5QL16 at high riskPO3 5UL15 at high riskPO3 5QP15 at high riskPO3 5RB14 at high riskPO3 5RZ14 at high riskPO3 5HH13 at high riskPO3 5ND11 at high riskPO3 5QQ10 at high risk

Where the postcodes at high or medium risk lie together

  • 24 postcodes at high or medium risk, outlined on the map. PO3 5UL, is the one with most homes and businesses at high risk.
  • 10 postcodes at high or medium risk, outlined on the map. PO3 5NX, is the one with most homes and businesses at high risk.
  • 9 postcodes at high or medium risk, outlined on the map. PO3 5QT, is the one with most homes and businesses at high risk.

What broadband can you get in PO3?

Ofcom reports on 429 of the 441 postcodes in PO3. At 406 of them every home and business can get gigabit broadband, and at 1 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit406 of 429
Postcodes where every home can get superfast416 of 429
Postcodes where some cannot get decent broadband1 of 429

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 PO3 at risk of flooding?

230 of the 441 postcodes in PO3 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 557 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 230 of 441 postcodes High: 349Medium: 208Low: 1,291Very low: 1,732

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 PO3?

Homes in PO3 sold for a typical £275,000 in the 12 months to August 2026, across 264 sales, up 0.3% on the 12 months before, HM Land Registry's figures show.

£275,000 typical price, the 12 months to August 2026
12 months to August 2025
£274,050
12 months to August 2026
£275,000

▲ up 0.3% on the 12 months before

Detached£385,000 11 sales
Semi-detached£325,000 39 sales
Terraced£276,000 179 sales
Flat or maisonette£155,000 35 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 PO3

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

PO3 5254 postcodesPO3 6187 postcodes
UK postcode format explained

Places in PO3

Towns and villages with postcodes in PO3, and how many each has here.

Portsmouth postcodes,438

Who covers PO3

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

  • Portsmouth North416
  • Portsmouth South25

Police force areas

  • Hampshire441

Next to PO3

PO2 postcode district PO4 postcode district All PO districts Portsmouth postcodes

"Next to" is by number: the districts before and after PO3 in the PO area.

Check a postcode

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