SS
19 districts, 11,979 postcodes
Southend-on-Sea, Basildon, Rochford, Castle Point, Thurrock, Chelmsford
| District | Postcodes | Local authority |
|---|---|---|
| SS0 | 737 | Southend-on-Sea |
| SS1 | 690 | Southend-on-Sea |
| SS11 | 478 | Basildon |
| SS12 | 404 | Basildon |
| SS13 | 495 | Basildon |
| SS14 | 734 | Basildon |
| SS15 | 640 | Basildon |
| SS16 | 658 | Basildon |
| SS17 | 784 | Thurrock |
| SS2 | 709 | Southend-on-Sea |
| SS22 | 3 | Southend-on-Sea |
| SS3 | 607 | Southend-on-Sea |
| SS4 | 589 | Rochford |
| SS5 | 544 | Rochford |
| SS6 | 746 | Rochford |
| SS7 | 1,120 | Castle Point |
| SS8 | 904 | Castle Point |
| SS9 | 1,052 | Southend-on-Sea |
| SS99 | 85 | Southend-on-Sea |