Homstølvatnet is a lake in the far western part of the municipality of Froland in Aust-Agder county, Norway. It is located about 12 kilometres (7.5mi) east of the village of Byglandsfjord. The lake has an area of 2.61 square kilometres (1.01sqmi) and is at an elevation of 350 metres (1,150ft) above sea level.