Macon County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 22,248. Its county seat is Lafayette.Macon County is part of the Nashville-Davidson - Mufreesboro - Franklin, TN Metropolitan Statistical Area.HistoryMacon County was formed in 1842 from parts of Smith and Sumner counties. It was named in honor of the late Revolutionary War veteran and United States Senator, Nathaniel Macon. The county seat was named in honor of the Marquis de Lafayette.The county's second-largest city, Red Boiling Springs, thrived as a mineral springs resort in the late 19th and early 20th centuries. Three hotels from this period - the Donoho, the Thomas House (previously the Cloyd Hotel), and the Armour (previously the Counts Hotel) - are still open, though only the Armour still offers mineral water treatments.GeographyAccording to the U.S. Census Bureau, the county has a total area of, of which is land and (0.03%) is water. The county is located amidst the northeastern Highland Rim, and is generally rugged and hilly.