Knockholt is a village and civil parish in the Sevenoaks District of Kent, England, lying approximately 5 miles (8.0 km) south of Orpington and 3 miles (4.8 km) northwest of Sevenoaks. It lies on the border line of Kent and Greater London. According to the 2001 census it had a population of 1,166.
The village is mostly a ribbon development, surrounded by fields that are a part of the Green Belt. There is mixed arable farming. It is in a hilly, rural location, on the top of the dip slope of the North Downs, and has views over London.
Until 1934 Knockholt was included in Bromley Rural District which was in Kent. It was than absorbed by Orpington Urban District as part of Orpington Civil Parish. When Greater London was created in 1965, Knockholt was included in the London Borough of Bromley. In 1969, it was removed from Bromley, and included in Sevenoaks Rural District so that it became a part of Kent. Since 1974 has been part of the Sevenoaks non-metropolitan district.