Clarksville is a city in Johnson County, Arkansas, United States. As of the 2010 census the population was 9,178, up from 7,719 in 2000. As of 2018, the estimated population was 9,743. The city is the county seat of Johnson County. It is nestled between the Arkansas River and the foothills of the Ozark Mountains, and Interstate 40 and US Highway 64 intersect within the city limits. Clarksville-Johnson County is widely known for its peaches, scenic byways and abundance of natural outdoor recreational activities.

Clarksville is a town in Clark County, Indiana, United States, along the Ohio River and is a part of the Louisville Metropolitan area. The population was 22,333 at the 2020 census. The town was founded in 1783 by early resident George Rogers Clark at the only seasonal rapids on the entire Ohio River, it is the oldest American town in the former Northwest Territory. The town is home to the Colgate clock, one of the largest clocks in the world and the Falls of the Ohio State Park, home to the world's largest exposed Devonian period fossil bed.

Clarksville is a town in northern Coös County, New Hampshire, United States. The population was 294 at the 2020 census. It is part of the Berlin, NH–VT Micropolitan Statistical Area.

New Scotland is a town in Albany County, New York, United States. The population was 9,096 at the 2020 census.

Clarksville is a town located in Allegany County, New York, United States. As of the 2020 census, the town had a total population of 982. The town is named after S.N. Clark, an agent of the Holland Land Company.

Clarksville is the county seat of Montgomery County, Tennessee, United States. It is the fifth-largest city in the state, after Nashville, Memphis, Knoxville, and Chattanooga. The city had a population of 166,722 as of the 2020 United States census.

Clarksville is a city and county seat of Red River County, Texas, United States, in the northernmost part of the Piney Woods region of East Texas. As of the 2020 census, the city population was 2,857.

Clarksville is an unincorporated community in Howard County, Maryland; the second highest-earning county in the United States according to the U.S. Census Bureau. The community is named for William Clark, a farmer who owned much of the land on which the community now lies and served as a postal stop that opened on the 4th of July 1851.

"Last Train to Clarksville" is a song by American rock band the Monkees. It was released as the band's debut single on August 16, 1966, and was later included on the group's self-titled album, which was released on October 10, 1966. The song, written by Tommy Boyce and Bobby Hart, was recorded at RCA Victor Studio B in Hollywood on July 25, 1966, and was already on the Boss Radio "Hit Bounds" playlist on August 17, 1966. The song topped the Billboard Hot 100 for the week ending November 5, 1966. Lead vocals were performed by the Monkees' drummer, Micky Dolenz. "Last Train to Clarksville" was featured in seven episodes of the band's television series, the most for any Monkees song.