Hyde Park is one of the largest parks in central London, England and one of the Royal Parks of London, famous for its Speakers' Corner.

The park is divided in two by the Serpentine Lake. The park is contiguous with Kensington Gardens, which is widely assumed to be part of Hyde Park, but is technically separate. Hyde Park is 350 acres (140 hectare/1.4 km²) and Kensington Gardens is 275 acres (110 ha/1.1 km²) giving an overall area of 625 acres (250 ha/2.5 km²), making this park larger than the Principality of Monaco (1.96 square kilometres or 485 acres).

The park was the site of The Great Exhibition of 1851, for which the Crystal Palace was designed by Joseph Paxton.

The park has become a traditional location for mass demonstrations. The Chartists, the Reform League, the Suffragettes and the Stop The War Coalition have all held protests in the park. Many protestors on the Liberty and Livelihood March in 2002 started their march from Hyde Park.

On 20 July 1982 in the Hyde Park and Regents Park bombings, two bombs linked to the Provisional Irish Republican Army caused the death of eight members of the Household Cavalry and the Royal Green Jackets and seven horses.