SO21 postcode district
SO21 holds 743 live postcodes around Colden Common, in Winchester, Test Valley, Basingstoke and Deane and 1 more council areas.
Towns and villages with their centre in SO21
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Colden Common | Hampshire | 3,419 |
| 2 | Compton | Hampshire | 2,311 |
| 3 | Sutton Scotney | Hampshire | 858 |
| 4 | Owslebury | Hampshire | 818 |
| 5 | Barton Stacey | Hampshire | 780 |
| 6 | Micheldever | Hampshire | 471 |
| 7 | Itchen Abbas | Hampshire | 467 |
| 8 | Hursley | Hampshire | 443 |
| 9 | Sparsholt | Hampshire | 417 |
Wards
| Name | Share of postcodes |
|---|---|
| Wonston and Micheldever | 34% |
| Colden Common and Twyford | 22% |
| Badger Farm and Oliver's Battery | 17% |
| Alresford and Itchen Valley | 9% |
| Upper Meon Valley | 7% |
| Harewood | 6% |
| The Worthys | 4% |
| St Bartholomew | 1% |
| Oakley & The Candovers | 1% |
| St Michael | 0% |
And 3 more.
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Winchester | 93% |
| Romsey and Southampton North | 6% |
| East Hampshire | 1% |
| Eastleigh | 0% |
| North West Hampshire | 0% |
| Basingstoke | 0% |
Deprivation
The middle postcode here sits in decile 8 of the English Index of Multiple Deprivation (2021-Census LSOAs), where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 0% of this district's postcodes sit in the most deprived three deciles, 58% in the least deprived three.
Deprivation deciles describe the LSOA neighbourhood each postcode sits in, weighted by postcodes rather than by people, because the postcode file carries no population. A district where the deprived neighbourhoods are densely populated will read better here than it would per resident.
Neighbouring districts in the SO area
SO14 · SO15 · SO16 · SO17 · SO18 · SO19 · SO20 · SO22 · SO23 · SO24 · SO25 · SO30 · SO31 · SO32 · SO40 · SO41 · SO42 · SO43 · SO45 · SO50 · SO51 · SO52 · SO53 · SO97
Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Postcode data is the ONS Postcode Directory, August 2026 edition; counts are live postcodes with a usable location. Northern Ireland postcodes carry a separate licence and are not included; Scotland joins when the site's Scottish coverage does.