Okaton, SD

ZIP code 57562 covers the small town of Onida, South Dakota. Known as the "Gateway to the Oahe Dam," this area is home to the Oahe Dam and Lake Oahe, offering beautiful views and recreational opportunities such as fishing and boating. The Oahe Dam Visitor Center provides insight into the construction and significance of the dam. Onida also boasts the Sully County Courthouse, a historic building located in the town's center.