nice place.

SS99 in Southend-on-Sea

22 postcode sectors mapped mainly to Southend-on-Sea. Choose a district or browse the guides below. These are postcode sectors, not named neighbourhood boundaries.

Postcode districts

SS99 guides

10 sectors

Authority grouping uses mapped sector boundaries from the Office for National Statistics, December 2025. It measures boundary area, not the number of addresses or residents. Guide names describe a place near the approximate sector centre.