| Business | Phone |
| Jefferson County Bad Check Div 300 Main St, Hillsboro 63050 | (636) 797-5599 |
| Jefferson County Building Comm 725 Maple St, Hillsboro 63050 | (636) 797-5310 |
| Jefferson County Circuit Clerk 300 Main St, Hillsboro 63050 | (636) 797-5443 |
| Jefferson County Code Enfrcmnt 725 Maple St, Hillsboro 63050 | (636) 797-5036 |
| Jefferson County Commissioners 729 Maple St, Hillsboro 63050 | (636) 797-5400 |
| Jefferson County Courthouse 300 Main St, Hillsboro 63050 | (636) 797-5555 |
| Jefferson County Data Prcssng 300 Main St # 1, Hillsboro 63050 | (636) 797-5493 |
| Jefferson County Emergency 300 Main St, Hillsboro 63050 | (636) 797-5381 |
| Jefferson County Fleet Svc 300 Main St, Hillsboro 63050 | (636) 797-5399 |
| Jefferson County Fleet Svc 355 Elm St, Hillsboro 63050 | (636) 797-5399 |
| Jefferson County Gvmnt 300 Main St, Hillsboro 63050 | (636) 789-4276 |
| Jefferson County Hwy Garage 5275 Highway B, Hillsboro 63050 | (636) 797-4016 |
| Jefferson County Judicial Crct 300 Main St, Hillsboro 63050 | (636) 797-5410 |
| Jefferson County Juvenile Dept 300 Main St # 1, Hillsboro 63050 | (636) 797-5350 |
| Jefferson County Maintenance 300 Main St, Hillsboro 63050 | (636) 797-5314 |
| Jefferson County Personnel Office 300 Main St, Hillsboro 63050 | (636) 797-5071 |
| Jefferson County Personnel Office 729 Maple St, Hillsboro 63050 | (636) 797-5071 |
| Jefferson County Planning 725 Maple St # 102, Hillsboro 63050 | (636) 797-5580 |
| Jefferson County Prosecuting 300 Main St, Hillsboro 63050 | (636) 797-5321 |
| Jefferson County Public Adm 300 2nd St, Hillsboro 63050 | (636) 797-5385 |
| Jefferson County Purchasing 300 Main St, Hillsboro 63050 | (636) 797-5380 |
| Jefferson County Purchasing 729 Maple St, Hillsboro 63050 | (636) 797-5380 |
| Jefferson County Recorder-Deed 729 Maple St, Hillsboro 63050 | (636) 797-5414 |
| Jefferson County Traffic Div 300 Main St, Hillsboro 63050 | (636) 797-5303 |
| Jefferson County Univ Ext Ctr 300 Main St, Hillsboro 63050 | (636) 797-5391 |
| Jefferson County Voter Rgstrtn 729 Maple St, Hillsboro 63050 | (636) 797-5486 |