| | Douglas County | IL | 17041 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=DouglasCounty+IL |
| | DuPage County | IL | 17043 | Chicago-Naperville-Schaumburg,
IL 16984 | Chicago-Naperville-Elgin,
IL-IN 16980 | Chicago-Naperville,
IL-IN-WI 176 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=DuPageCounty+IL |
| | Edgar County | IL | 17045 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=EdgarCounty+IL |
| | Edwards County | IL | 17047 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=EdwardsCounty+IL |
| | Effingham County | IL | 17049 | | Effingham, IL 20820 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=EffinghamCounty+IL |
| | Fayette County | IL | 17051 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=FayetteCounty+IL |
| | Ford County | IL | 17053 | | Champaign-Urbana, IL 16580 | Champaign-Urbana-Denville,
IL 169 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=FordCounty+IL |
| | Franklin County | IL | 17055 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=FranklinCounty+IL |
| | Fulton County | IL | 17057 | | Canton, IL 15900 | Peoria-Canton, IL 427 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=FultonCounty+IL |
| | Gallatin County | IL | 17059 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=GallatinCounty+IL |