Abercrombie River National Park is a national park in New South Wales, Australia. It is west of Sydney. The Abercrombie and Retreat Rivers flow through the park. The park protects a large area of open forest, the largest area in this part of New South Wales. There are large trees, Casuarina cunninghamia, growing along the river. The river is normally a series of deep waterholes. In the park there are platypuses, rakalis, wallaroos, red-necked wallabies, swamp wallabies and Eastern Grey Kangaroos.