Castle Ring is an ancient British camp close to Birchover in Derbyshire.

It is oval in shape, the diameters being 160 feet and 243 feet. The central area is now entirely closed by a modern wall and immediately outside this is an embankment about two feet high. The ground slopes away on all sides but more especially on the west and north and if the embankment were further protected by a wooden stockade as seems probable in olden times, the site could easily be defended.

Most of the hill forts of this type belong to the Iron Age but it is not possible without a great deal of laborious digging to fix the period exactly.