| | | Stark County | IL | 17175 | | Peoria, IL 37900 | Peoria-Canton, IL 427 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=StarkCounty+IL |
| | | Alexander County | IL | 17003 | | Cape Girardeau, MO-IL 16020 | Cape Girardeau-Sikeston,
MO-IL 164 | Outlying | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=AlexanderCounty+IL |
| | | Bond County | IL | 17005 | | St. Louis, MO-IL 41180 | St. Louis-St.
Charles-Farmington, MO-IL 476 | Outlying | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=BondCounty+IL |
| | | Champaign County | IL | 17019 | | Champaign-Urbana, IL 16580 | Champaign-Urbana-Denville,
IL 169 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=ChampaignCounty+IL |
| | | Coles County | IL | 17029 | | Charleston-Mattoon, IL 16660 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=ColesCounty+IL |
| | | DeKalb County | IL | 17037 | Elgin, IL 20994 | Chicago-Naperville-Elgin,
IL-IN 16980 | Chicago-Naperville,
IL-IN-WI 176 | Outlying | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=DeKalbCounty+IL |
| | | Jackson County | IL | 17077 | | Carbondale, IL 16060 | Carbondale-Marion-Herrin,
IL 166 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=JacksonCounty+IL |
| | | Johnson County | IL | 17087 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=JohnsonCounty+IL |
| | | McDonough County | IL | 17109 | | Macomb, IL 31380 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=McDonoughCounty+IL |
| | | Perry County | IL | 17145 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=PerryCounty+IL |
