University Of Illinois Ext 100 S Jackson St Mc Leansboro, IL 62859 Phone : (618) 643-3416 Business Category Government Offices-County Legislative Bodies Hamilton County Extension Office 100 S Jackson St Mc Leansboro, IL 62859 Phone : (618) 643-3416 Business Category Government Offices-County Legislative Bodies United States Government--university Of Illinois Extension, Hamilton County Office Mc Leansboro, IL 62859 Phone : (618) 643-3416 Business Category Schools-Universities & Colleges Schools