Plainfield is a village in Coshocton County, Ohio, United States, along Wills Creek.

[7] According to the United States Census Bureau, the village has a total area of 0.41 square miles (1.06 km2), all land.

There were 76 housing units at an average density of 185.4 per square mile (71.6/km2).

The racial makeup of the village was 96.8% White, 0.6% African American, and 2.5% from two or more races.

29.0% of all households were made up of individuals, and 14.5% had someone living alone who was 65 years of age or older.

30.3% of all households were made up of individuals, and 9.1% had someone living alone who was 65 years of age or older.