Pukwana, SD

ZIP code 57370 serves Ravinia, a small rural community in Charles Mix County, South Dakota, within the Yankton Sioux Reservation. The built-up area is modest, with the Ravinia Post Office among its main local points of reference rather than a major tourist landmark. Nearby, Lake Andes National Wildlife Refuge is a prominent regional feature, protecting wetlands and prairie habitat used by migratory birds.