you can always get the parcel # and go down to the county assessor's office. From there it's public information as to who owns the property (whether it be some level of govt, or in fact private). A lot of county assessors are now available on-line with various search tools (maps you zoom in on, etc...). And some of the real estate sites (zillow, realtor.com, etc..) may also give county parcel #'s when you zoom in and fly around the map in your area. With that #, you can go to the assessor's for the information. It will only be a name with a mailing address though (whomever gets the property tax bill), and no other info. But at least you'll know public vs. private.
If your county assessor isn't on-line with that much info, then you can usually go in to their offices, and from there, they usually have all the county plat maps available for public viewing. Simply flip through the pages till you get to that specific plot. Then take that # up to the counter, and the clerk can look it up for you.