The John Messer Barn is a historic structure within the Great Smoky Mountains National Park in Sevier County, Tennessee, United States.

The Whaleys later sold their farm to John H. Messer, who was married to Pinkney's cousin, Lucy.

The barn was added to the National Register of Historic Places in 1976 and is the last surviving structure from the pre-park Greenbrier Cove community.

[2] The gabled roof, as with all double-cantilevers, has considerable overhang, allowing livestock shelter in inclement weather.

[3] The barn's foundation is dry-stacked field stone and is higher on one end to compensate for the hill slope.