SS postcode area
The SS area holds 19 districts and 11,987 live postcodes; its largest place is Southend-on-Sea.
| District | Live postcodes | Largest place with its centre there |
|---|---|---|
| SS0 | 737 | Westcliff-on-Sea |
| SS1 | 692 | Southend-on-Sea |
| SS2 | 711 | — |
| SS3 | 609 | Great Wakering |
| SS4 | 591 | Rochford |
| SS5 | 545 | — |
| SS6 | 747 | Rayleigh |
| SS7 | 1,120 | South Benfleet |
| SS8 | 903 | Canvey Island |
| SS9 | 1,052 | — |
| SS11 | 476 | Rettendon |
| SS12 | 403 | Wickford |
| SS13 | 495 | Pitsea |
| SS14 | 735 | — |
| SS15 | 640 | — |
| SS16 | 658 | Basildon |
| SS17 | 786 | Stanford-le-Hope |
| SS22 | 3 | — |
| SS99 | 84 | — |
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.