Map
General Information
| Postal Area | Southend-on-Sea |
| Postcode | SS9 3YZ |
| User Type | Large (more than 25 items of mail per day) |
| Region | East of England |
| Country | England |
| Local authority | Southend-on-Sea |
| Introduction Date | 1998-12-01 |
| Termination Date | 2001-07-01 |
| IMD 2025 | Decile 9 (most deprived = 1, least = 10) Rank 28,217 of 33,755 English Indices of Deprivation 2025 |
Geographic Information
| Latitude | 51.5510510 |
| Longitude | 0.6494170 |
| Easting | 583785 |
| Northing | 186900 |
| Quality | Postcode sector mean, (mainly PO Boxes) |