Largest cities and towns in Alabama by population Birmingham is Alabama's most populous municipality. Alabama State Capitol in Montgomery, Alabama's capital city and second largest city by population Skyline of Mobile, Alabama's third largest municipality Skyline of Huntsville, Alabama's fourth largest municipality Downtown area of Tuscaloosa, Alabama's fifth largest municipality        County seat        State capital and county seat Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named Census 2010 "2000-2010 Entity Changes" (txt). 2010 United States Census. United States Census Bureau. Retrieved June 17, 2016.  "Cusseta Reinstated As City; Council, Mayor Appointed". Worldnow and 12 WSFA. Archived from the original on 2015-10-05. Retrieved 2015-08-31.  Unknown parameter |url-status= ignored (help) Accardi, Marian (February 23, 2018). "Huntsville votes to annex into Morgan". www.decaturdaily.com. Decatur Daily. Retrieved February 25, 2018.  "Resolution No. 2006=02 Authorizing Employment of Municipal Council" (PDF). Town of Magnolia Springs. 2006-12-11. Archived from the original (PDF) on 2015-10-06. Retrieved 2015-08-31.