Elgin, OK

ZIP code 73538 is located in Fort Sill, Oklahoma. This area is home to the United States Army post, Fort Sill, which serves as a training center for field artillery soldiers. The post includes landmarks such as the historic Old Post Quadrangle, the Fort Sill National Historic Landmark and Museum, and the Geronimo's Grave site. Additionally, the ZIP code encompasses the Fort Sill National Cemetery, a final resting place for veterans and their families.