Barnhill is a village in Tuscarawas County, Ohio, United States.

According to the United States Census Bureau, the village has a total area of 0.36 square miles (0.93 km2), all land.

There were 157 housing units at an average density of 436.1 per square mile (168.4/km2).

19.2% of all households were made up of individuals, and 8.2% had someone living alone who was 65 years of age or older.

The racial makeup of the village was 98.35% White, 0.55% African American, and 1.10% from two or more races.

21.6% of all households were made up of individuals, and 9.0% had someone living alone who was 65 years of age or older.