The Green Park, one of the Royal Parks of London, is in the City of Westminster, Central London. Green Park is to the north of the gardens and semi-circular forecourt of Buckingham Palace, across Constitution Hill road. The park is in the middle of a near-continuous chain of green spaces in Westminster that includes St James's Park, Hyde Park, and Kensington Gardens. To the northwest of Green Park is the district of St James's including, Lancaster House, Clarence House, and St James's Palace.

The Royal Parks make up land that was originally used for the recreation, mostly hunting, by the royal family. They are part of the hereditary possessions of The Crown, now managed by The Royal Parks, a charity which manages eight royal parks and certain other areas of parkland in London. The Royal Parks charity was created as a company limited by guarantee in March 2017 and officially launched in July 2017. Its chief executive is Andrew Scattergood.