Wilmington Downs is a 209.8-hectare (518-acre) biological Site of Special Scientific Interest north-west of Eastbourne in East Sussex.

[1][2] The site includes a Scheduled Monument, the Long Man of Wilmington, a turf cut figure which may be of prehistoric origin.

[3] This site is mainly chalk grassland on the steep slope of the South Downs.

It is important for invertebrates, including two protected under Schedule 5 of the Wildlife and Countryside Act, 1981, the wart-biter grasshopper and the snail Monacha cartusiana.

There are also several unusual species of lichens and mosses.