List of settlements in East Sussex by population

Brighton
& Hove

Hastings

Eastbourne

Bexhill

Seaford

Crowborough

Hailsham

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East Sussex's largest settlements, with its city in bold, and district centres in yellow.

Portslade

Peacehaven

Lewes

Uckfield

Newhaven

Saltdean

Polegate

Heathfield

Battle

Rye

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East Sussex's 8th–17th largest settlements and district centres in yellow

This is a list of settlements in East Sussex by population based on the results of the 2011 census. The next United Kingdom census will take place in 2021. In 2011, there were 16 built-up area subdivisions with 5,000 or more inhabitants in East Sussex, shown in the table below.