Grafton is a village in Lorain County, Ohio, United States, along the East Branch of the Black River.

The Lorain Correctional Institution and several other prisons are located in and near Grafton.

There were 1,008 housing units at an average density of 214.0 per square mile (82.6/km2).

20.1% of all households were made up of individuals, and 7.4% had someone living alone who was 65 years of age or older.

There were 853 housing units at an average density of 189.0 per square mile (73.0/km2).

19.4% of all households were made up of individuals, and 8.7% had someone living alone who was 65 years of age or older.