Fannin County is a county in the Northwest region of the U.S. state of Georgia. As of the 2020 census, the population was 25,319. It is one of the most rural counties in Georgia due its location in the Appalachian Mountain Range, with about 90% of the population of Fannin County living in unincorporated lands. The county seat and largest city is Blue Ridge. The county was created on January 21, 1854, and is named after James Fannin, a veteran who fought in the Texas Revolution.