SS99 postcode district: Southend-on-Sea and around

SS99 is a postcode district in England, with 84 postcodes in use in 5 sectors. It has postcodes in Southend-on-Sea. Its council is Southend-on-Sea.

Postcodes in use: 84
Sectors: 5
Council: Southend-on-Sea
Places: Southend-on-Sea

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in SS99, by flood risk

A home or business at high risk: 0
At medium risk at worst: 0
At low risk at worst: 0
At very low risk only: 0
Not on the at-risk list: 84

Of the 84 postcodes in SS99 that ONS places, 84 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode. Names in italics are council wards: we hold no town or village names here.

The middle of its postcodes: latitude 51.5483, longitude 0.7136. Open this area on OpenStreetMap

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

What broadband can you get in SS99?

Ofcom reports on 4 of the 84 postcodes in SS99. At 4 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit4 of 4

Postcodes where every home can get superfast4 of 4

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is SS99 at risk of flooding?

None of the 84 postcodes in SS99 is on the Environment Agency's list of postcodes with a home or business in an area at risk of flooding from rivers or the sea.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it