Lone Oak (also Browns Chapel or Top of the Mountain) is an unincorporated community and census-designated place (CDP) in southern Sequatchie County, Tennessee, United States.

[5] Lone Oak is part of the Chattanooga, TN–GA Metropolitan Statistical Area.

As of the 2020 United States census, there were 1,198 people, 423 households, and 336 families residing in the CDP.

Lone Oak does not have its own post office or zip code.

This Sequatchie County, Tennessee geography–related article is a stub.