Cullman County is a county located in the north central portion of the U.S. state of Alabama. As of the 2020 census, the population was 87,866. Its county seat and largest city is Cullman. Its name is in honor of Colonel John G. Cullmann. Cullman County comprises the Cullman, AL Micropolitan Statistical Area, which is a component of the Birmingham-Hoover-Talladega, AL Combined Statistical Area.