Wonboyn is a village in New South Wales, Australia in Bega Valley Shire. It is on Wonboyn Lake. At the 2006 census, Wonboyn had a population of 310.
Wonboyn provides a secluded vacation spot catering to fisherfolk and campers. Wonboyn Cabins and Campground provides year-round accommodation in a rural setting with access to the lake, its boat ramps, National Forest Preserves and beaches within just a few kilometres.