Champaign County Of--treasurer Courthouse Urbana, OH 43078 Phone : (937) 484-1640 Business Category Government Offices-County Government Offices & Public Schools Champaign County Treasurer 1512 S Us Highway 68 # B400 Urbana, OH 43078 Phone : (937) 484-1640 Business Category Government Offices-County Public Finance Taxation & Monetary Policy Government Offices & Public Schools