Old Deer Park, Park and cricket ground in Richmond, London, United Kingdom

Old Deer Park is a large open space in Richmond, London, covering 147 hectares (360 acres), with sports grounds for rugby, golf, and cricket. It is bounded by the River Thames to the west, Kew Gardens to the north, and the town of Richmond to the east and south.

In 1603, King James I established a hunting park here, and the current name was adopted after 1637 when Richmond Park was created. The railway in 1847 and a new road in 1933 cut through the southern part, separating it from the town.

The park's name comes from its past as a deer hunting ground, though no deer remain today. Local cricket and rugby clubs use the grounds, and the public spaces occasionally host circuses and funfairs, giving the park a community feel.

The park is accessed from the A316 and A307, with a public car park and various sports facilities. Visitors can enter from Richmond town via a narrow bridge over the railway or from the A316; the riverside area is prone to flooding, so check conditions after heavy rain.

Two stone obelisks by the Thames were built in 1769 to help align telescopes at King's Observatory for observing the transit of Venus. A legend says they commemorate two men who died in a duel over a woman.