Jefferson County Clerk 729 Maple St Hillsboro, MO 63050 Phone : (636) 797-5478 Business Category Automated Teller Machines (Atm) Government Offices & Public Schools Jefferson County Court House--county Clerk Hillsboro, MO 63050 Phone : (636) 797-5478 Business Category Government Offices-County County Government-Courts Courts Government Offices & Public Schools