University of Missouri Extension in Jefferson County Back to Search University of Missouri Extension in Jefferson County 301 3rd Street P.O. Box 497 , Hillsboro , MO , 63050 301 3rd. Street P.O. Box 497 , Hillsboro , MO , 63050 (636) 797-5055 Send Email https://extension.missouri.edu/jefferson Contacts Primary Jody Ferguson Administrative Assistant Jim Osia Share × Print Email Facebook LinkedIn X Pinterest Powered By GrowthZone