West Okoboji Lake (sometimes known as West Lake Okoboji) is a natural body of water, approximately 3,847 acres (15.57 km2) in area, in Dickinson County in northwest Iowa in the United States. It is part of the chain of lakes known as the Iowa Great Lakes. The area was long inhabited by the Santee or Dakota Sioux. The Dakota-language name for the lake was Minnetonka, meaning "great waters".The cities of Arnolds Park, Okoboji, West Okoboji, and Wahpeton sit on its shore.