Map
General Information
| Postal Area | Southend-on-Sea |
| Postcode | SS9 3WD |
| User Type | Large (more than 25 items of mail per day) |
| Region | East of England |
| Country | England |
| Local authority | Southend-on-Sea |
| Introduction Date | 2003-06-01 |
| Termination Date | 2004-08-01 |
| IMD 2025 | Decile 9 (most deprived = 1, least = 10) Rank 28,217 of 33,755 English Indices of Deprivation 2025 |
Geographic Information
| Latitude | 51.5509970 |
| Longitude | 0.6494140 |
| Easting | 583785 |
| Northing | 186894 |
| Quality | Postcode sector mean, (mainly PO Boxes) |