Union County is a county located in the north central portion of the U.S. state of Georgia. As of the 2020 census, the population was 24,632. The county seat is Blairsville.

Blairsville is a city and the county seat of Union County, on the northern border of Georgia, United States. It was founded near the Nottely River, which was dammed in 1942 as part of the Tennessee Valley Authority project, forming Lake Nottely. As of the 2020 census, the city had a population of 616.