Hanahan is a city in Berkeley County, South Carolina, United States. The population was 13,818 at the 2005 census estimate. As defined by the U.S. Census Bureau, Hanahan is included within the Charleston-North Charleston Urbanized Area and the larger Charleston-North Charleston Metropolitan Statistical Area. Hanahan apartments for rent comparison page shows most up to date rent information on Hanahan apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.