Look it up on the county's GIS map, and find out who has ownership. If it's a city, I doubt you could legally hunt it. If county, then I don't know, but I would sure try to find someone with the county who could answer the question. It doesn't sound to me like something that would be state land, but if it were it would be either Fish & Wildlife or DNR, and if so, it would PROBABLY be legal to hunt. But as I said I would definitely find out first who actually owns it. If you can't figure out how to do it online, just go to the county courthouse and have someone there help you identify the land owner.