Fort Sill, OK

ZIP code 73503 is located in Lawton, Oklahoma. This area is home to Fort Sill, a historic military base that serves as the United States Army Field Artillery School. Other significant landmarks include the Comanche National Museum and Cultural Center, which showcases the history and culture of the Comanche people. The ZIP code also encompasses part of the Wichita Mountains Wildlife Refuge, a beautiful natural area with hiking trails and wildlife viewing opportunities.