Stephanie Bukowski, 19, was driving a 1999 Buick Centurion east on Ohio 224 in Greenwich Township when the Centurion went off the left side of the road, struck a driveway embankment, landed in a yard and overturned, an Ohio State Highway Patrol dispatcher said.
She was not wearing a seat belt and was thrown from the vehicle.
The crash happened at about 12:05 a.m. Bukowski was flown from the scene to Mercy St. Vincent Medical Center in Toledo.
There was no listing for her at the hospital Thursday evening.
Charges have not been filed, according to the Highway Patrol.