And if the Antiquities Act isn't enough of a law, Ohio like many other States has to deal with another set of laws under the National Historic Preservation Act - NHPA.
You can visit the following link for more information on the NHPA.
To keep this law stuff simple: if you are detecting in Ohio, especially on State Land, do not dig anything that you believe is an artifact, or anything that is older than 100 years.
If you want to detect on private property, then be sure you get written permission from the landowner. Although verbal permission is ok, written permission is more desirable.
For detecting in Ohio, town, village and city parks, you'll need to check with those local officials.
In Case Your Thinking This, do not quit the hobby.
Some individuals give up metal detecting because they feel strangled by the laws. If your thinking about tossing your detector in the closet for good, don't do it. That is exactly what the beauracrats who make these silly laws want us to do. And the Archaeologists who have been trying to get metal detecting banned would be one step closer to their goal. The above would love to see our hobby closed off for good. Don't quit!
I cannot be responsible for any outdated laws from the time of this posting.
Be Careful, do not break the law!