Ashleworth Ham is a 104.73-hectare biological Site of Special Scientific Interest. It is a large area of grassland on the Severn floodplain, north of Ashleworth in Gloucestershire, England. It is registered as a Site of Special Scientific Interest and was notified in 1974 and renotified in 1985.

It floods easily, particularly during the winter, which makes it the perfect wetland for overwintering birds.