Worth /ˈwɜːrθ/ is a civil parish in the Mid Sussex district of West Sussex, a county in southeast England. It includes the villages of Copthorne and Crawley Down, and covers an area of 1,995 hectares (4,930 acres). The population at the time of the 2001 census was 9,888. At the 2011 Census the population of the civil parish had increased to 10,378. The ecclesiastical parish was one of the larger West Sussex parishes, encompassing the entire area along the West Sussex/Surrey border between the town of Crawley, east of its High Street, and East Grinstead. The creation of Turners Hill civil parish meant that Worth parish is now only one-third of its original size.