Brown County Taxes:
http://brownauditor.ddti.net/

Butler County Taxes:
http://propertysearch.butlercountyohio.org/butler/Main/Home.aspx

Hamilton County Taxes:
http://www.hamiltoncountyauditor.org/realestate/rover30.asp

Warren County Taxes:
http://www.co.warren.oh.us/auditor/property_search/index.htm

Clermont County Taxes:
http://www.clermontauditorrealestate.org/Main/Home2.aspx

Montgomery County Taxes:
http://www.mcrealestate.org/Main/Home.aspx