Morgan County is a county in the north-central part of the U.S. state of Alabama. As of the 2020 census, its population was 123,421. The county seat is Decatur. On June 14, 1821, it was renamed in honor of American Revolutionary War General Daniel Morgan of Virginia. It is a prohibition or dry county, although alcohol sales are allowed in the cities of Decatur, Hartselle, and Priceville.