Map
General Information
| Postal Area | Southend-on-Sea |
| Postcode | SS9 4QJ |
| User Type | Large (more than 25 items of mail per day) |
| Region | East of England |
| Country | England |
| Local authority | Southend-on-Sea |
| Introduction Date | 1992-08-01 |
| Termination Date | 1997-12-01 |
| IMD 2025 | Decile 6 (most deprived = 1, least = 10) Rank 18,789 of 33,755 English Indices of Deprivation 2025 |
Geographic Information
| Latitude | 51.5609020 |
| Longitude | 0.6504660 |
| Easting | 583818 |
| Northing | 187998 |
| Quality | Postcode sector mean, (mainly PO Boxes) |