The Royal Parks of London are lands originally owned by the monarchy of the United Kingdom for the recreation, mostly hunting, of the royal family. They are part of the hereditary possessions of The Crown.
With increasing urbanisation of London, some of these were preserved as freely accessible open space and became public parks with the introduction of the Crown Lands Act 1851. There are today eight parks formally described by this name and they cover almost 2,000 hectares (4,900 acres) of land in Greater London.
Of these, Regent's Park, Hyde Park and Kensington Gardens (which are adjacent), Green Park and St James's Park (also close to each other) are the largest green spaces in central London. Bushy Park, Greenwich Park and Richmond Park are in the outer boroughs.
The Royal Parks agency also manages other open spaces: the Brompton Cemetery, Grosvenor Square Gardens, Victoria Tower Gardens and the gardens of 10, 11 and 12 Downing Street. Hampton Court Park is also a royal park within Greater London, but as it contains a palace, it is administered by the Historic Royal Palaces, unlike the eight Royal Parks.
The public does not have any legal right to use the Parks, as public access depends on the grace and favour of The Crown, although there are public rights of way across the land. Until 2017, the Royal Parks Agency managed the Royal Parks under powers derived from section 22 of the Crown Lands Act 1851. As part of its statutory management function the Agency permitted the public to use the Parks for recreational purposes, subject to regulations issued under the Parks Regulation Acts 1872–1926 which were considered necessary to secure proper management, preserve order and prevent abuse within the Parks. The Royal Parks and Other Open Spaces Regulations 1997 then came into effect until a separate charity took over the parks from the Royal Parks Agency. 
The parks were managed by The Royal Parks (an executive agency of the Department for Culture, Media and Sport) until the agency joined with charity The Royal Parks Foundation to form a new charity - The Royal Parks - launched in July 2017. The parks are policed by the Royal Parks Operational Command Unit of the Metropolitan Police (the English section of the previous force policing the parks, the Royal Parks Constabulary, has been abolished). Some funding for the Royal Parks comes from a central government grant. This contrasts with most of London's other parks, which are funded by local borough councils. The Royal Parks charity generates the majority of its income from commercial activities such as catering and staging public events such as concerts.
In 2010, Mayor of London Boris Johnson proposed that control over the Royal Parks should be devolved to the Greater London Authority and the government put forward proposals for that to happen later on that year. The plan was welcomed by Royal Parks but not implemented.