Punyelroo is a town located on the Murray River in South Australia, Australia, approximately 5 kilometres downstream from Swan Reach, but on the opposite (western or right) bank. The town is named after a local homestead. It accessible only by well-made dirt road, most conveniently off the Sedan Swan Reach Road. At the 2006 census, Punyelroo had a population of 256. Punyelroo is known for the Punyelroo Cave, located on the banks of the Murray River. The cave is approximately 3 kilometres in length, and is the longest of the several caves located in the Murray Plains area.