Ruffey Lake Park is a park in the City of Manningham, Melbourne, Victoria, Australia. It is situated around Ruffey Lake in a portion of a valley through which the Ruffey Creek runs, forming the border between Doncaster and Templestowe. It has three main entrances, Victoria St, The Boulevard and King St. Despite being the second-largest park in Manningham, second to Westerfolds Park, it is the biggest urban park managed by the City of Manningham. It is approximately 68 hectares in size. Formerly orchards, the park has a diverse ecology; this includes a riparian strip of native bushland around the creek, areas of pine trees planted by early settlers and pockets of fruit trees remaining from past orchards.

The City of Manningham is a local government area in Victoria, Australia in the north-eastern suburbs of Melbourne and is divided into 12 suburbs, with the largest being Doncaster and Doncaster East. It comprises an area of 113 square kilometres and had a population of 125,508 in June 2018.