Hannibal is a Mississippi river city of 17,757, located in Marion and Ralls County, Missouri. Hannibal is located at the intersection of U.S. highways 36 and 61, approximately 110 miles north of St. Louis. The Hannibal Micropolitan Statistical Area is composed of Marion and Ralls Counties. Hannibal apartments for rent comparison page shows most up to date rent information on Hannibal apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.