Grafton is a village in Lorain County, Ohio, United States, along the East Branch of the Black River. The population was 2,302 at the 2000 census. The Lorain Correctional Institution and several other prisons are located in and near Grafton.
Grafton is located at 41°16′33″N 82°3′11″W / 41.27583°N 82.05306°W / 41.27583; -82.05306 (41.275919, -82.053154).
According to the United States Census Bureau, the village has a total area of 4.5 square miles (11.7 km²), all of it land.