| | Warren County | IL | 17187 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=WarrenCounty+IL |
| | Whiteside County | IL | 17195 | | Sterling, IL 44580 | Dixon-Sterling, IL 221 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=WhitesideCounty+IL |
| | Winnebago County | IL | 17201 | | Rockford, IL 40420 | Rockford-Freeport-Rochelle,
IL 466 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=WinnebagoCounty+IL |
| | Woodford County | IL | 17203 | | Peoria, IL 37900 | Peoria-Canton, IL 427 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=WoodfordCounty+IL |
| | Hardin County | IL | 17069 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=HardinCounty+IL |
| | Lawrence County | IL | 17101 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=LawrenceCounty+IL |
| | Saline County | IL | 17165 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=SalineCounty+IL |
| | Schuyler County | IL | 17169 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=SchuylerCounty+IL |
| | Wabash County | IL | 17185 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=WabashCounty+IL |
| | White County | IL | 17193 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=WhiteCounty+IL |