Illinois State Prison Inmate Locator 
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Illinois County Jail Rosters
If marked NA then none are available and link will go to Sheriff or Jail
Adams Alexander (NA) Bond (NA) Boone (NA)
Brown (NA) Bureau (NA) Calhoun (NA) Carroll (NA)
Cass (NA) Champaign Christian (NA) Clark (NA)
Clay Clinton (NA) Coles (NA) Cook
Crawford Cumberland (NA) Dekalb (NA) Dewitt (NA)
Douglas DuPage Edgar Edwards (NA)
Effingham (NA) Fayette Ford Franklin (NA)
Fulton (NA) Gallatin (NA) Greene (NA) Grundy (NA)
Hamilton (NA) Hancock (NA) Hardin (NA) Henderson (NA)
Henry (NA) Iroquois (NA) Jackson Jasper
Jefferson Jersey (NA) Jo Daviess (NA) Johnson
Kane Kankakee (NA) Kendall Knox
Lake LaSalle (NA) Lawrence Lee
Livingston (NA) Logan (NA) Macon (NA) Macoupin (NA)
Madison (NA) Marion (NA) Marshall (NA) Mason
Massac (NA) McDonough McHenry McLean (NA)
Menard (NA) Mercer (NA) Monroe (NA) Montgomery (NA)
Morgan (NA) Moultrie (NA) Ogle (NA) Peoria (NA)
Perry (NA) Piatt (NA) Pike (NA) Pope (NA)
Pulaski (NA) Putnam (NA) Randolph Richland (NA)
Rock Island Saline Sangamon Schuyler
Scott (NA) Shelby (NA) St. Clair (NA) Stark (NA)
Stephenson (NA) Tazewell Union (NA) Vermilion (NA)
Wabash Warren (NA) Washington (NA) Wayne (NA)
White (NA) Whiteside Will Williamson
Winnebago Woodford (NA)    

Federal Inmate Locator
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You can identify a federal inmate as they will always have five numbers, dash then three numbers 00000-000|