De Graff is a village located in Logan County, Ohio, United States. The population was 1,285 at the 2010 census. De Graff was named in honor of a railroad official. 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.
De Graff is located at 40°18′41″N 83°54′55″W. 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.
As of the census of 2010, there were 1,285 people, 476 households, and 347 families residing in the village. The population density was 1,272.3 inhabitants per square mile (491.2/km2). There were 536 housing units at an average density of 530.7 per square mile (204.9/km2). The racial makeup of the village was 97.5% White, 0.9% African American, 0.3% Native American, 0.2% Asian, 0.2% Pacific Islander, 0.2% from other races, and 0.7% from two or more races. Hispanic or Latino of any race were 0.2% of the population.
There were 476 households, of which 40.3% had children under the age of 18 living with them, 56.7% were married couples living together, 11.1% had a female householder with no husband present, 5.0% had a male householder with no wife present, and 27.1% were non-families. 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 average household size was 2.70 and the average family size was 3.21.
The median age in the village was 34.8 years. 30.7% of residents were under the age of 18; 5.8% were between the ages of 18 and 24; 25.9% were from 25 to 44; 24.6% were from 45 to 64; and 12.9% were 65 years of age or older. The gender makeup of the village was 48.9% male and 51.1% female.
Riverside School District, including Riverside High School, serves the children of the De Graff area. It also owns WDEQ, a non-commercial community radio station.
A branch of the Logan County District Library serves the De Graff community.