Contact Information

Jefferson County

Mary Dempsey, County Manager
10325 Business 21 Suite 100
Hillsboro, MO 63050-3587

Phone: (636) 797-9601
Income Maintenance Fax: (636) 797-9780

Jefferson County
Arnold Office
Cross Creek Center
3675 W. Outer Road Ste #103
Arnold, MO 63010-5232

Phone: (636) 287-1364
Fax: (636) 287-1278