Overhall Grove is a 17.4-hectare (43-acre) biological Site of Special Scientific Interest to the east of Knapwell in Cambridgeshire.

[1][2] It is a Nature Conservation Review site, Grade II,[3] and it is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.

It was seriously affected by Dutch elm disease, but many trees have regenerated from their bases, and the mixture of new growth and dead wood provides a very good habitat for insects and birds.

There are the remains of a medieval manor and moat at the northern end, and a family of badgers have unearthed pottery dating back to the eleventh century.

[4] The ecological value of the site is enhanced by a stream, ponds, clearings and rides.