Spencer, SD

ZIP code 57374 encompasses the town of Onida, South Dakota. A notable landmark in this area is the Onida Watchtower, a towering structure that offers panoramic views of the surrounding prairies and farmlands. The town also boasts the Sully County Courthouse, a historic building that serves as the center of government operations for the county. With its small-town charm and scenic vistas, Onida is a hidden gem in the heart of South Dakota.