Pennsylvania
Toledo?
Memphis, tenn
Pineton, Pennsylvania is halfway between Ohio and Asbury
The halfway point between Medina and Dayton is on I-71 just north of Columbus, near Sunbury, Delaware, and Alum Creek State Park.
Sugar Grove, Ohio is the halfway point.
Dayton Ohio
Silver Springs, OH is the halfway point.
Somerset, Pennsylvania is about halfway between Cleveland Ohio and Columbia Maryland
The halfway point between Dallas, Texas and Warren, Ohio is in Centerville, Tennessee.
Halfway between Columbus and Cincinnati
Cambridge, Ohio is pretty close to halfway.