| Business | Phone |
| Jefferson County Assessor 729 Maple St, Hillsboro 63050 | (636) 797-5466 |
| Jefferson County Auditor 300 Main St, Hillsboro 63050 | (636) 797-5458 |
| Jefferson County Revenue Cllct 300 Main St, Hillsboro 63050 | (636) 797-5406 |
| Jefferson County Treasurer 729 Maple St, Hillsboro 63050 | (636) 797-5368 |