Assessor-personal Property Division 300 Main St Union, MO 63084 Phone : (636) 583-6346 Business Category Government Offices-County Public Finance Taxation & Monetary Policy Government Offices & Public Schools Franklin County Of--court House, Assessor-personal Property Div Union, MO 63084 Phone : (636) 583-6346 Business Category Government Offices-County Government Offices & Public Schools