Copthorne is a village in the Mid Sussex district of West Sussex, England. It lies close to Gatwick Airport, south of London, north of Brighton, and northeast of the county town of Chichester. Nearby towns include Crawley to the southwest and East Grinstead to the east. It is the most northerly ecclesiastical parish in the Diocese of Chichester in the Church of England, and together with Crawley Down makes up the civil parish of Worth.