Old Monroe City Of 151 Main St Old Monroe, MO 63369 Phone : (636) 661-5112 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools Old Monroe City Of--city Hall Old Monroe, MO 63369 Phone : (636) 661-5112 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools