Coordinates: 51°23′37″N 0°8′49″W / 51.39361°N 0.14694°W
Mitcham Common is 182 hectares (460 acres) of common land situated in south London. It is predominantly in the London borough of Merton, with parts straddling the borders of Croydon and Sutton. It is designated a Site of Metropolitan Importance for Nature Conservation.
In feudal times, the poorest, least productive soil in a parish was designated as common land available for parishioners to graze animals and cut turf and timber for fuel. Members of this community with these rights were known as commoners. However, in the 19th century when material for road building became a valuable resource, the old grazing land was replaced by a series of pits for gravel extraction.
These works reached such a proportion that public opposition, led by George Parker Bidder QC, culminated in the protection of the common under the Metropolitan Commons Act and the cost of its maintenance was split between the parish councils of Mitcham, Beddington, Wallington and Croydon according to the proportion of the common within each parish boundary.