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 Kensiā¦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.