Raisby Hill Grassland is a Site of Special Scientific Interest in east County Durham, England.

In the undisturbed part of Raisby Hill primary magnesian limestone grassland is the main vegetation type.

Blue moor-grass, Sesleria albicans, is abundant, and there is a rich assemblage of species characteristic of calcareous soils, such as quaking grass, Briza media, meadow oat grass, Avenula pratensis, glaucous sedge, Carex flacca, and fragrant orchid, Gymnadenia conopsea.

The skeletal soils in the abandoned quarry at the southwestern end of the site support the largest population of dark-red helleborine, Epipactis atrorubens, in County Durham.

This article about a Site of Special Scientific Interest in England is a stub.