SO Postcode Area for the Southampton Region

A wide range of spatial data has been analysed to present this overview. If you would like anything added, please contact us.

This section of the site is all about the SO Postcode area, also known as the Southampton Postal Area. Explore links to the next level to learn more about specific postcode districts such as SO14.

Map of the SO Postcode Area

Map of The SO Postcode
Terrain Map of the SO Southampton Postcode.
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Map of the SO Southampton Postcode Area

Explore the postcode area by using our interactive map.


Quick Facts about the SO Postcode

SO Area Statistics
Width from East to West 28.93 mi
Height from North to South 35.05 mi
Area of SO 590.44 mi²
Maximum Width 39.22 mi
Perimeter of Postcode Area 192.22 mi
Number of Postcode Districts 25
Number of Postcode Sectors 122
Number of Post Towns 9
Number of Postcodes 18,374
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The SO postcode area represents a group of 23 postal districts in the Southampton area of the United Kingdom. The area code stands for the letters s and o in SOuthampton. The area has a population of 665,193 and covers an area of 1,515,963 hectares. Fun fact: 1.02% of the population of Great Britain lives in this area.

The postcode area falls within the following counties: Hampshire (99.99%), Wiltshire (0.01%).

Where is the SO Postcode Area?

The SO Southampton Postcode is in the South East of England. The postal area borders the following neighbouring postal areas: PO - Portsmouth, GU - Guildford, SP - Salisbury, BH - Bournemouth and RG - Reading, It also borders The Solent and The English Channel.


Map Showing Location of the postcode area
Where is the postcode area?
A word cloud for the postcode area
A word cloud for the area

How built up is the Postcode Area?

I've calculated the total area covered by building footprints within the postcode area.
By analyzing this against the total area, I've determined the percentage of the area that's developed, this will give you an idea of how urban or rural the postcode region is.
The higher the percentage the more urban the area is. For example the least urban district is SO42 and the most urban is SO14.

Building Area Summary
Postcode District Total Area (m²) Footprint Area (m²) Built Percentage %
SO42 124,159,204 526,523 0.42%
SO43 79,718,357 419,862 0.53%
SO20 151,745,122 944,898 0.62%
SO24 171,745,425 1,097,708 0.64%
SO21 271,330,318 1,875,837 0.69%
SO32 142,751,577 1,932,173 1.35%
SO51 146,947,959 2,215,954 1.51%
SO41 78,002,067 2,277,200 2.92%
SO40 75,177,971 2,267,764 3.02%
SO45 52,080,288 1,843,758 3.54%
SO52 8,595,435 327,503 3.81%
SO22 22,178,002 1,319,684 5.95%
SO30 25,519,984 1,708,885 6.70%
SO50 33,253,596 2,423,752 7.29%
SO31 33,551,479 2,453,015 7.31%
SO23 14,657,646 1,168,901 7.97%
SO16 30,007,475 2,605,888 8.68%
SO53 12,587,624 1,643,492 13.06%
SO18 9,991,867 1,324,179 13.25%
SO19 12,574,554 1,714,925 13.64%
SO15 10,562,940 1,918,622 18.16%
SO17 3,160,452 655,087 20.73%
SO14 4,370,226 1,240,553 28.39%
Total 1,514,669,568 (m²) 35,906,163 (m²) 2.37%
Map of the SO Postcode Area

A map showing the boundary of SO in relation to other areas

There are 8 towns within the Southampton postcode area.

Map of the SO Southampton Postcode Area
Map of Posttowns in the SO
Map of Posttowns in the SO Postal Area
Area of the SO postcode area
Unit Area²
Hectares 1,515,963²
Miles 5,853²
Feet 163,176,741,357²
Kilometres 15,160²

Postal Delivery Offices Serving the Postcode Area

  • Alresford (so) Delivery Office
  • Bishops Waltham Scale Payment Delivery Office
  • Bitterne Manor
  • Broughton Scale Payment Delivery Office
  • Eastleigh Delivery Office
  • Hedge End Delivery Office
  • Hythe (so) Delivery Office
  • Lymington Delivery Office
  • Over Wallop Scale Payment Delivery Office
  • Romsey Delivery Office
  • Sarisbury Green Delivery Office
  • Shirley (so) Delivery Office
  • Stockbridge Scale Payment Delivery Office
  • Swanmore Scale Payment Delivery Office
  • Totton Delivery Office
  • Waltham Chase Scale Payment Delivery Office
  • Winchester Delivery Office

Tourist Attractions within the Area

Nearby Postcodes

Towns and Villages within the Area