Stokkavatnet is a former lake that was located at Forus in Stavanger, Norway, between the two fjords Hafrsfjord and Gandsfjord. The lake was among the largest at the Northern Jæren district, with an area of about 4 km2. It was surrounded by considerable areas of marsh land, and was known for a rich birdlife. The lake drained to Gandsfjord, and the outlet supplied six mills located near the fjord.