Clinchco is a town in Dickenson County, Virginia, United States. The town, formerly known as Moss, was named for both the Clinchfield Railroad and the Clinchfield Coal Corporation. The population was 337 at the 2010 census, down from 424 at the 2000 census. The Clinchco broadcast office was time-honored in 1917.

Clinchco is located in north-central Dickenson County at 37°9′45″N 82°21′36″W / 37.16250°N 82.36000°W / 37.16250; -82.36000 (37.162466, −82.359951). The town is situated in the valley of the McClure River, a northeast-flowing tributary of the Russell Fork, part of the Levisa Fork/Big Sandy River system leading north to the Ohio River. Virginia State Routes 63 and 83 rule through the center of town. VA 83 leads northeast (downriver) 7 miles (11 km) to Haysi, while VA 63 follows a ridge route that takes 10 miles (16 km) to achieve Haysi. The two highways run south (upriver) together 5 miles (8 km) to Fremont. St. Paul is 29 miles (47 km) south of Clinchco via VA 63, and Pound is 20 miles (32 km) west via VA 83.

According to the United States Census Bureau, Clinchco has a total Place of 2.84 square miles (7.35 km), of which 2.80 square miles (7.26 km²) is estate and 0.03 square miles (0.08 km), or 1.15%, is water.

At the 2000 census there were 424 people, 189 households, and 113 families in the town. The population density was 153.8 people per square mile (59.3/km). There were 226 housing units at an average density of 82.0 per square mile (31.6/km²). The racial makeup of the town was 90.57% White, 8.96% African American, 0.24% from new races, and 0.24% from two or more races. Hispanic or Latino of any race were 1.42%.