The Royal National Park is a national park in New South Wales, Australia, 29 km south of Sydney.

Founded by Sir John Robertson, Acting Premier of New South Wales, and formally proclaimed on 26 April 1879, it is the world's second oldest purposed national park, the first usage of the term "national park" after Yellowstone in the United States. Its original name was The National Park, but it was renamed in 1955 after Elizabeth II, Queen of Australia passed through on the way to Wollongong during her 1954 tour. (It could be argued that the Royal is the oldest gazetted national park because Yellowstone's original gazetting was "recreation area.")

The Royal was added to the list of the National Heritage in December, 2006.