Purple Hill is a 14.9-hectare (37-acre) biological Site of Special Scientific Interest south of Gillingham in Kent.

[1][2] It is a Nature Conservation Review site, Grade 2.

[3] This chalk downland site has herb-rich grassland, scrub and woods.

Flora include the nationally rare Kentish milkwort and several uncommon orchids.

[4] The site is private land with no public access.