On June 11, 2018, the U. S. Supreme Court ruled that Ohio is allowed to purge eligible voters from the state’s registration records if they have not cast ballots in a while. That means that you may no longer be on Ohio’s voter rolls, even if you think you are. Or, you might not ever have registered at your current address, for whatever reason.
You can check to see if you are registered to vote by going to Vote.org.
If you are not registered, you can register at Ohio’s Online Voter Registration System.