Wollumbin National Park (previously known as 'Mount Warning National Park') is a national park located in northern New South Wales, Australia, north of Sydney near the border with the state of Queensland. It surrounds Mount Warning, part of a remnant caldera of a much larger extinct volcano (the Tweed volcano). The park is administered by the NSW National Parks and Wildlife Service. The park is part of the Scenic Rim Important Bird Area, identified as such by BirdLife International because of its importance in the conservation of several species of threatened birds.