De Graff is a village located in Logan County, Ohio, United States.

[5] Different sources format the community's name in several different ways: besides the official De Graff, the name has been rendered De Graft, DeGraff, Degraff, and Degraft.

[6] According to the United States Census Bureau, the village has a total area of 1.01 square miles (2.62 km2), all of it land.

25.6% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older.

The racial makeup of the village was 99.67% White, 0.17% African American and 0.17% Asian.

29.2% of all households were made up of individuals, and 14.6% had someone living alone who was 65 years of age or older.

A branch of the Logan County District Library serves the De Graff community.