Loyston is a ghost town in Union County, Tennessee, United States, that was inundated by the waters of the Clinch River after the completion of Norris Dam in 1936.

[3] Established in the early 19th century around a foundry built by its namesake, John Loy, over subsequent decades the community's location along State Highway 61 helped it grow into a trading center for local farmers.

By the time the Tennessee Valley Authority (TVA) began making plans to build Norris Dam in the early 1930s, Loyston had a population of approximately 70 residents, and consisted of a post office and several small businesses.

[4] Prior to inundation, TVA conducted extensive sociological surveys of Loyston's residents, and the community was documented by photographer Lewis Hine.

[4] In the early 19th century, John Loy established a foundry in the area, taking advantage of the iron ore deposits at the base of Big Ridge.

[9] By the early 1930s, when TVA agents were surveying the Clinch River Valley for the Norris Dam Project, Loyston consisted of a post office, two general stores, a filling station, a cafe, a mill, and a barbershop.

In 2008, the Museum of Appalachia accepted a donation of a children's playhouse that originally stood in Loyston and was said to be the last intact building from the community.