Loudon is a city in and the county seat of Loudon County, Tennessee.  It is included in the Knoxville, Tennessee Metropolitan Area. The city is located southwest of Knoxville, on the Tennessee River.

Fort Loudon, the colonial era fort for which the city was named, is located several miles to the south in Monroe County.

Loudon County, Tennessee, is among the fastest growing communities in the state. Located within a day's drive of 75% of the nation's population, its numerous waterways and scenic beauty partner beautifully with the area's heritage and culture to provide exceptional quality of life for its residents.