Castle Combe is a magical little village and civil parish within the Cotswolds Area of Natural Beauty in Wiltshire, England. The village lies about 5 miles northwest of the town of Chippenham. The village has two parts: one is in the narrow valley of the By Brook, while Upper Castle Combe is on higher ground to the east, on the B4039 road which links Chippenham with Chipping Sodbury. The village was a location for the 1967 film musical Doctor Dolittle, but its frequently rainy summer climate, and the residents' irritation at the producers' modifications of the area for shooting that was severe enough to incite attempted sabotage – including by British Army officer (and future explorer) Sir Ranulph Fiennes – frustrated production. Other productions include "The Murder of Roger Ackroyd", an episode of Agatha Christie's Poirot, and the films Stardust and The Wolfman. Throughout September 2010, the village was a key filming location for Steven Spielberg's production of War Horse.
Raymond Austin set the action of his book Find me a Spy, Catch me a Traitor in the village and at the Manor. The house of Alice Cartalet in the manga and anime series Kiniro Mosaic was based on Fosse Farmhouse, a guesthouse near Castle Combe.
The village was a filming location for the fantasy adventure movie Mariah Mundi and the Midas Box in 2012, and later for a series of Downton Abbey.