State Route 115 is an east to west highway in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Tennessee

Tennessee

Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...

 that is 49 miles (78 km) long. It begins in Blount County

Blount County, Tennessee

Blount County is a U.S. county located in the U.S. state of Tennessee. Its population was 123,010 at the United States Census, 2010. The county seat is at Maryville, which is also the county's largest city....

 and ends in Knox County

Knox County, Tennessee

Knox County is a county in the U.S. state of Tennessee. Its 2007 population was estimated at 423,874 by the United States Census Bureau. Its county seat is Knoxville, as it has been since the creation of the county. The county is at the geographical center of the Great Valley of East Tennessee...

. State Route 115 is little-known by the general public by this designation as it is overlain by U.S. Route 129

U.S. Route 129

U.S. Route 129 is an offshoot route of U.S. Route 29, which it intersects near Athens, Georgia. US 129 currently runs for 582 miles from Knoxville, Tennessee, to Chiefland, Florida, at U.S. Route 19 and U.S. Route 98. It passes through the states of Tennessee, North Carolina, Georgia and Florida...

; the "115" designation is seen on mileposts.

Counties traversed (east to west)

State Route 115 traverses the counties shown in the table below.

Counties traversed by State Route 115
County	miles	kilometers
Blount Blount County, Tennessee Blount County is a U.S. county located in the U.S. state of Tennessee. Its population was 123,010 at the United States Census, 2010. The county seat is at Maryville, which is also the county's largest city....	20.5	33.0
Monroe	1.1	1.7
Blount Blount County, Tennessee Blount County is a U.S. county located in the U.S. state of Tennessee. Its population was 123,010 at the United States Census, 2010. The county seat is at Maryville, which is also the county's largest city....	20.4	32.8
Knox Knox County, Tennessee Knox County is a county in the U.S. state of Tennessee. Its 2007 population was estimated at 423,874 by the United States Census Bureau. Its county seat is Knoxville, as it has been since the creation of the county. The county is at the geographical center of the Great Valley of East Tennessee...	6.7	10.7