Little Green Lake is a lake located in Green Lake County, Wisconsin. It has a surface area of 462 acres (1.87 km2) and a max depth of 28 ft (8.5 m). Little Green Lake lies just over three miles to the south of Wisconsin's deepest natural lake, Green Lake. There is one unnamed island that is 0.3 acres (0.0012 km2) in size. Little Green Lake is about a mile north of Markesan.