Walpole Park is a municipal urban public open space run by Ealing Borough Council, and its main entrance is situated in Mattock Lane, Ealing, West London.
In 1987-10-01 it was registered by English Heritage on the Register of Parks and Gardens of Special Historic Interest in England. It is some 28 acres (110,000 m) in size. Within its boundaries are the Pitzhanger Manor museum & art gallery and Perceval Lodge. These buildings and part of the boundary wall are also statutory protected structures of Grade I and Grade II respectively.
There is also a late Victorian ornamental lake bordering the House's rear lawn and further west a pond which has a pair of fountains, both of which attract water fowl.
The land for the park and Pitizhanger Manor itself, was acquired by the council in 1899 from Sir Spencer Walpole, which in turn had been bought by his father the Rt. Hon. Spencer Horatio Walpole. The sum paid was £40,000. It was opened to the public for the first time on 1 May 1901.