Contact Information

Jefferson County

Mary Dempsey, County Manager
10325 Highway 21
P O Box 1088
Hillsboro, MO 63050-1088

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

Jefferson County
Arnold Office
Cross Creek Center
3675 West Outer Road
P O Box 626
Arnold, MO 63010-0626

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