Caterham is a town in the Tandridge district of Surrey, England. The town is administratively divided into two: Caterham on the Hill, and Caterham Valley, which includes the main town centre in the middle of a dry valley but rises to equal heights to the south. The town lies close to the A22, 21 miles from Guildford and 6 miles south of Croydon, in an upper valley cleft into the dip slope of the North Downs. Caterham on the Hill is above the valley to the west.

Tandridge is a local government district in east Surrey, England. Its council is based in Oxted, although the largest settlement is Caterham; other notable settlements include Warlingham, Godstone and Lingfield. In mid-2019, the district had an estimated population of 88,129.