Iowa Great Lakes
![The Iowa Great Lakes Region, showing Spirit Lake (top), West Okoboji Lake (left), and East Okoboji Lake (right). Map courtesy of USGS](/Images/godic/202501/20/Wpdms_usgs_iowa_great_lakes5635.jpg")
The Iowa Great Lakes are a group of natural glacial lakes in Dickinson County in northwestern Iowa in the United States. The three principal lakes of the group are Spirit Lake, West Okoboji Lake, and East Okoboji Lake. They are the largest natural lakes in the state of Iowa. The largest, Spirit Lake, is 5,684 acres (23 km²). The area is often referred to simply as Okoboji.