SS99 postcode district
SS99 holds 84 live postcodes around Southend-on-Sea, in Southend-on-Sea.
No listed town or village has its centre in SS99; the nearest are on the neighbouring districts below.
Wards
| Name | Share of postcodes |
|---|---|
| St Laurence | 61% |
| Kursaal | 27% |
| Victoria | 12% |
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Southend West and Leigh | 61% |
| Southend East and Rochford | 39% |
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. 39% of this district's postcodes sit in the most deprived three deciles, 61% 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 SS area
SS0 · SS1 · SS2 · SS3 · SS4 · SS5 · SS6 · SS7 · SS8 · SS9 · SS11 · SS12 · SS13 · SS14 · SS15 · SS16 · SS17 · SS22
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.