Athens is the county seat of McMinn County, Tennessee, United States and the principal city of the Athens Micropolitan Statistical Area has …Athens is the county seat of McMinn County, Tennessee, United States and the principal city of the Athens Micropolitan Statistical Area has a population of 53,569. The city is located almost equidistantly between the major cities of Knoxville and Chattanooga. The population was 14,084 at the 2020 census.