Can police pull you over in Ohio for not wearing seatbelt?

In the state of Ohio, failure to wear a seat belt is a primary traffic offense.

A primary traffic offense is one for which a police officer may stop your vehicle and issue a citation, even if there is no other traffic violation or reasonable suspicion of criminal activity.

In other words, yes, police in Ohio can pull you over for not wearing a seat belt even if you are not committing any other traffic violation.