SG3 postcode district
SG3 holds 206 live postcodes around Knebworth, in North Hertfordshire, Welwyn Hatfield, East Hertfordshire.
Towns and villages with their centre in SG3
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Knebworth | Hertfordshire | 4,155 |
| 2 | Datchworth | Hertfordshire | 1,210 |
Wards
| Name | Share of postcodes |
|---|---|
| Knebworth | 58% |
| Welwyn East | 24% |
| "Aston | 18% |
| Hertford Rural | 0% |
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Stevenage | 76% |
| Welwyn Hatfield | 24% |
| North East Hertfordshire | 0% |
Deprivation
The middle postcode here sits in decile 9 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, 80% 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 SG area
SG1 · SG2 · SG4 · SG5 · SG6 · SG7 · SG8 · SG9 · SG10 · SG11 · SG12 · SG13 · SG14 · SG15 · SG16 · SG17 · SG18 · SG19
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.