Chorleywood is both a village and a civil parish in the Three Rivers District, Hertfordshire, on the border with Buckinghamshire, approximately 20 miles (32 km) northwest of Charing Cross. The village is adjacent to the Chiltern Hills Area of Outstanding Natural Beauty and is part of the London commuter belt included in the government-defined Greater London Urban Area. Chorleywood was historically part of the parish of Rickmansworth, becoming a separate ecclesiastical parish in 1845 and a separate civil parish in 1898. The population of the parish was 11,286 at the 2011 census.

Three Rivers is a local government district in south-west Hertfordshire, England. Its council is based in Rickmansworth. The district borders Hertsmere, Watford, St Albans, Dacorum, Buckinghamshire, and the London boroughs of Hillingdon and Harrow.