Roundwood Park is a public park in Willesden, London, measuring a total of 26.5 acres, or approximately 10.27 hectares. It was originally known in the 19th century as Knowles Hill, or Hunger Hill Common Field, and after much work by Oliver Claude Robson, became the Roundwood Park known to the public today.

Willesden is an area of north-west London, situated 5 miles (8 km) north-west of Charing Cross. It is historically a parish in the county of Middlesex that was incorporated as the Municipal Borough of Willesden in 1933; it has formed part of the London Borough of Brent in Greater London since 1965. Dollis Hill is also sometimes referred to as being part of Willesden.