Westham is a large village and civil parish in the Wealden District of East Sussex, England.

The parish is virtually part of the Greater Eastbourne conurbation, and much expansion has been occurring here: hence the large population.

The site is of biological interest consisting of low-lying grazing meadows, hosting a wide variety of wetland flora and fauna.

St Mary's is depicted in a number of paintings by the Victorian landscapist Lewis Pinhorn Wood (1848-1918), including 'Westham Church from Pevensey Castle looking West'.

St Luke's parish church at Stone Cross (also serving the settlement of North Langney)[10] is a more recent building of 1926; it stands at a crossroads near the windmill.