Hamlin is a town in and the county seat of Lincoln County, West Virginia, United States, along the Mud River. The population was recorded as 1,040 at the 2020 census. It is part of the Huntington–Ashland metropolitan area.

Lincoln County is a county in the U.S. state of West Virginia. As of the 2020 census, the population was 20,463. Its county seat is Hamlin. The county was created in 1867 and named for Abraham Lincoln.