Map
General Information
| Postal Area | Southend-on-Sea |
| Postcode | SS1 1FU |
| User Type | Small (less than 25 items of mail per day) |
| Region | East of England |
| Country | England |
| Local authority | Southend-on-Sea |
| Introduction Date | 2021-05-01 |
| IMD 2025 | Decile 1 (most deprived = 1, least = 10) Rank 1,301 of 33,755 English Indices of Deprivation 2025 |
Geographic Information
| Latitude | 51.5363540 |
| Longitude | 0.7134010 |
| Easting | 588279 |
| Northing | 185428 |
| Quality | Imputed by ONS, by reference to surrounding postcode grid references |