Pratt's Bottom is a village in Greater London, England, within the London Borough of Bromley and, prior to 1965, within the historic county of Kent. It is south of its parent parish of Orpington, lies about 100 metres above sea level and beyond London's urban sprawl.

The London Borough of Bromley is a borough in London, England. It borders the county of Kent, of which it formed part of until 1965. The borough's population in the 2021 census was 329,991. It is named after Bromley, its principal district. Other districts are Penge, Hayes, West Wickham, Chislehurst, Beckenham and Orpington. The local authority is Bromley London Borough Council.