Belsize Park is an area of north-west London, England, in the London Borough of Camden. It gives its name to a ward of the borough, called Belsize, which covers most of Belsize Park; the rest of Belsize Park is part of Hampstead Town.
It is located 3.4 miles (5.5 km) north-west of Charing Cross and has a station on the Northern line. Some nearby localities are Hampstead to the north and west, Kentish Town and Gospel Oak to the east, Camden Town to the south east and Primrose Hill to the south. It is a lively area with many restaurants, pubs and cafés along Haverstock Hill and also England's Lane. Hampstead Heath is a 10- to 12-minute walk. Primrose Hill park is a 5-minute walk from England's Lane and provides some of the best views of Central London.
Belsize Park is in the Hampstead and Kilburn constituency whose present MP is Tulip Siddiq.
The name is derived from French bel assis meaning 'well situated'. The Manor of Belsize dates back to 1317.
Although not named on the Geographers' London Atlas, the area has many thoroughfares bearing its name: Belsize Avenue, Belsize Court, Belsize Crescent, Belsize Gardens, Belsize Grove, Belsize Lane, Belsize Mews, Belsize Park (the road), Belsize Park Gardens, Belsize Place, Belsize Square, and Belsize Terrace. The name comes from the 17th-century manor house and parkland (built by Daniel O'Neill for his wife, the Countess of Chesterfield) which once stood on the site. The estate built up between 1852 and 1878, by which time it extended to Haverstock Hill. After World War I, the construction of blocks of flats began, and now a great many of the larger houses are also converted into flats.