There are 18 US Post Offices in Tuscaloosa County serving a total of 173,905 residents equating to 9,661 residents per post office. It's estimated that approximately 277,572 packages are handled across the 18 county post offices annually. Tuscaloosa County is a county in the U.S. state of Alabama. As of the 2010 census, its population was 194,656. Its county seat and largest city is Tuscaloosa, the former state capital from 1826 to 1845. The county is named in honor of Tuskaloosa, a paramount chief of the Mississippian culture, considered ancestors of the Choctaw in the region. Tuscaloosa County is included in the Tuscaloosa, AL Metropolitan Statistical Area. The county is the home of the University of Alabama and Stillman College."