Warrumbungle National Park is located in central northern New South Wales, Australia, 550 km northwest of Sydney. Outside of the Sydney metropolitan area parks, it is the most-visited national park in New South Wales. The official name is Warrumbungle National Park, based on the geographical name Warrumbungle Mountain Range. This range is sometimes shortened to the Warrumbungles, and thus the park name is often heard in the plural. The comic strip Warrumbunglers may also have played some part in this usage.
The park lies within the Pilliga Important Bird Area, so identified by BirdLife International because of its importance for a range of woodland bird species, many of which are threatened. Warrumbungle National Park was added to the Australian National Heritage List in December 2006.