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Time Zone and FIPS Codes for Counties in Illinois

Wednesday, October 9, 2013 by — creator of Time Genie

Updated: Friday, March 11, 2016

Flag of Illinois, United States

Flag of Illinois.

This page provides information about time zone and FIPS (Federal Information Processing Standards) codes for each county in Illinois.

For specific information about cities or towns in Illinois, please visit the Illinois cities page.


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Map of Counties in Illinois

Map of counties in Illinois, United States
A map of counties in Illinois. You can also download this map in PDF format.

Time Zones and FIPS Codes for Illinois

The following cities or towns are located in more than 1 county:

Alexis: Mercer County, Warren County

Algonquin: McHenry County, Kane County

Arlington Heights: Cook County, Lake County

Arthur: Douglas County, Moultrie County

Aurora: Kane County, DuPage County, Kendall County, Kendall County,

Barrington: Cook County, Lake County

Bartlett: DuPage County, Cook County, Kane County

Batavia: Kane County, DuPage County

Bolingbrook: Will County, DuPage County

Bradford: Stark County, Bureau County

Brighton: Macoupin County, Jersey County

Buffalo Grove: Cook County, Lake County

Burr Ridge: DuPage County, Cook County

Casey: Clark County, Cumberland County

Centralia: Marion County, Clinton County, Washington County, Washington County,

Channahon: Grundy County, Will County

Chebanse: Iroquois County, Kankakee County

Chicago: Cook County, DuPage County

Coal Valley: Rock Island County, Henry County

Columbia: Monroe County, St. Clair County

Deerfield: Lake County, Cook County

El Paso: Woodford County, McLean County

Elgin: Kane County, Cook County

Elk Grove Village: Cook County, DuPage County

Elmhurst: DuPage County, Cook County

Fairmont City: St. Clair County, Madison County

Fox River Grove: McHenry County, Lake County

Frankfort: Will County, Cook County

Grayville: Edwards County, White County

Hanover Park: Cook County, DuPage County

Hoffman Estates: Cook County, Kane County

Huntley: McHenry County, Kane County

Joliet: Will County, Kendall County

Keyesport: Bond County, Clinton County

Lakemoor: Lake County, McHenry County

Lemont: Cook County, Will County, DuPage County

Maple Park: DeKalb County, Kane County

Matteson: Cook County, Will County

Minooka: Grundy County, Kendall County, Will County

Montgomery: Kane County, Kendall County

Moweaqua: Shelby County, Christian County

Naperville: DuPage County, Will County

Orland Park: Cook County, Will County

Park Forest: Cook County, Will County

Pekin: Tazewell County, Peoria County

Peoria Heights: Peoria County, Woodford County

Plainfield: Will County, Kendall County

Rochelle: Ogle County, Lee County

Roselle: Cook County, DuPage County

Sandwich: DeKalb County, Kendall County, La Salle County

Sauk Village: Cook County, Will County

Seneca: La Salle County, Grundy County

Somonauk: DeKalb County, La Salle County

Streator: La Salle County, Livingston County

Tinley Park: Cook County, Will County

University Park: Will County, Cook County

Washburn: Marshall County, Woodford County

Wheeling: Cook County, Lake County

Willow Springs: Cook County, DuPage County

Woodridge: DuPage County, Cook County, Will County

Click a heading to sort the table.

County FIPS Time Zone Cities / Towns
Adams County 17001 Central Clayton, Columbus, Golden, Liberty, Quincy
Alexander County 17003 Central Cache, Cairo, Elco, Olive Branch, Tamms
Bond County 17005 Central Greenville, Keyesport
Boone County 17007 Central Belvidere, Capron
Brown County 17009 Central Fargo, Mount Sterling
Bureau County 17011 Central Arlington, Bradford, Buda, Dover, Ladd, New Bedford, Princeton, Spring Valley, Tiskilwa, Wyanet
Calhoun County 17013 Central Michael
Carroll County 17015 Central Lanark, Milledgeville, Savanna, Thomson
Cass County 17017 Central Arenzville, Beardstown, Virginia
Champaign County 17019 Central Champaign, Fisher, Ivesdale, Longview, Mahomet, Ogden, Prospect, Rantoul, Sadorus, Savoy, St. Joseph, Thomasboro, Urbana
Christian County 17021 Central Assumption, Moweaqua, Pana, Stonington, Taylorville
Clark County 17023 Central Casey, Marshall, Martinsville
Clay County 17025 Central Flora, Louisville
Clinton County 17027 Central Albers, Beckemeyer, Breese, Carlyle, Centralia, Germantown, Keyesport, New Baden, Trenton
Coles County 17029 Central Ashmore, Charleston, Mattoon, Oakland
Cook County 17031 Central Alsip, Arlington Heights, Barrington, Bartlett, Bedford Park, Bellwood, Berkeley, Berwyn, Blue Island, Bridgeview, Broadview, Brookfield, Buffalo Grove, Burbank, Burr Ridge, Calumet City, Calumet Park, Chicago, Chicago Heights, Chicago Ridge, Cicero, Crestwood, Deerfield, Des Plaines, Dixmoor, Dolton, East Hazel Crest, Elgin, Elk Grove Village, Elmhurst, Elmwood Park, Evanston, Evergreen Park, Flossmoor, Ford Heights, Forest Park, Forest View, Frankfort, Franklin Park, Glencoe, Glenview, Glenwood, Golf, Hanover Park, Harvey, Harwood Heights, Hazel Crest, Hickory Hills, Hillside, Hodgkins, Hoffman Estates, Homewood, Inverness, Justice, Kenilworth, La Grange, La Grange Park, Lansing, Lemont, Lincoln Park, Lincolnwood, Lynwood, Lyons, Markham, Matteson, Maywood, McCook, Melrose Park, Midlothian, Morton Grove, Mount Prospect, Niles, Norridge, North Riverside, Northbrook, Northfield, Northlake, Oak Forest, Oak Lawn, Oak Park, Olympia Fields, Orland Park, Palatine, Palos Hills, Palos Park, Park Forest, Park Ridge, Posen, Prospect Heights, River Forest, River Grove, Riverdale, Riverside, Rolling Meadows, Roselle, Rosemont, Sauk Village, Schaumburg, Schiller Park, Skokie, South Barrington, South Chicago Heights, South Holland, Steger, Stickney, Stone Park, Streamwood, Summit, Thornton, Tinley Park, University Park, Westchester, Wheeling, Wicker Park, Willow Springs, Wilmette, Winnetka, Woodridge, Worth
Crawford County 17033 Central Flat Rock, Palestine, Robinson
Cumberland County 17035 Central Casey, Greenup, Toledo
De Witt County 17039 Central Clinton, DeWitt, Weldon
DeKalb County 17037 Central Clare, Cortland, DeKalb, Genoa, Kirkland, Maple Park, Sandwich, Somonauk, Sycamore, Waterman
Douglas County 17041 Central Arcola, Arthur, Murdock, Tuscola
DuPage County 17043 Central Addison, Aurora, Bartlett, Batavia, Bensenville, Bolingbrook, Burr Ridge, Carol Stream, Chicago, Clarendon Hills, Darien, Downers Grove, Elk Grove Village, Elmhurst, Glen Ellyn, Glendale Heights, Hanover Park, Hinsdale, Itasca, Lemont, Lisle, Lombard, Naperville, Oak Brook, Oakbrook Terrace, Roselle, Villa Park, Warrenville, West Chicago, Westmont, Wheaton, Willow Springs, Willowbrook, Winfield, Wood Dale, Woodridge
Edgar County 17045 Central Logan, Paris
Edwards County 17047 Central Albion, Grayville, West Salem
Effingham County 17049 Central Altamont, Dieterich, Effingham, Teutopolis
Fayette County 17051 Central Vandalia
Ford County 17053 Central Gibson City, Melvin, Paxton, Piper City, Roberts
Franklin County 17055 Central Benton, Christopher, West Frankfort, Whittington
Fulton County 17057 Central Astoria, Avon, Canton, Cuba, Norris, Smithfield, Vermont
Gallatin County 17059 Central Equality, Omaha, Ridgway
Greene County 17061 Central Roodhouse, White Hall
Grundy County 17063 Central Channahon, Coal City, Gardner, Kinsman, Mazon, Minooka, Morris, Seneca
Hamilton County 17065 Central McLeansboro
Hancock County 17067 Central Carthage, Hamilton, Plymouth, Warsaw
Hardin County 17069 Central Cave–In–Rock, Rosiclare
Henry County 17073 Central Alpha, Cleveland, Coal Valley, Galva, Geneseo, Kewanee, Orion, Osco, Woodhull
Iroquois County 17075 Central Ashkum, Chebanse, Donovan, Gilman, Loda, Milford, Watseka, Wellington
Jackson County 17077 Central Carbondale, Pomona
Jasper County 17079 Central Newton
Jefferson County 17081 Central Centralia, Mount Vernon
Jersey County 17083 Central Brighton, Jerseyville
Jo Daviess County 17085 Central East Dubuque, Hanover, Stockton, Warren
Johnson County 17087 Central Vienna
Kane County 17089 Central Algonquin, Aurora, Bartlett, Batavia, Burlington, Carpentersville, Elburn, Elgin, Geneva, Gilberts, Hampshire, Hoffman Estates, Huntley, Kaneville, Maple Park, Montgomery, North Aurora, Pingree Grove, Saint Charles, South Elgin, St. Charles, Sugar Grove, Virgil, West Dundee
Kankakee County 17091 Central Bourbonnais, Bradley, Chebanse, Grant Park, Kankakee, Manteno, Momence
Kendall County 17093 Central Aurora, Bristol, Joliet, Minooka, Montgomery, Newark, Oswego, Plainfield, Plano, Sandwich, Yorkville
Knox County 17095 Central Abingdon, Galesburg
La Salle County 17099 Central Grand Ridge, LaSalle, Lostant, Marseilles, Mendota, North Utica, Oglesby, Ottawa, Peru, Sandwich, Seneca, Serena, Somonauk, Streator, Tonica, Troy Grove, Wedron
Lake County 17097 Central Antioch, Arlington Heights, Bannockburn, Barrington, Buffalo Grove, Deerfield, Fort Sheridan, Fox River Grove, Grayslake, Green Oaks, Gurnee, Highland Park, Highwood, Ingleside, Lake Bluff, Lake Forest, Lake Villa, Lake Zurich, Lakemoor, Libertyville, Lincolnshire, Lindenhurst, Long Grove, Mettawa, Mundelein, Naval Station Great Lakes, North Chicago, Park City, Riverwoods, Round Lake, Russell, Vernon Hills, Volo, Wauconda, Waukegan, Wheeling, Winthrop Harbor, Zion
Lawrence County 17101 Central Lawrenceville
Lee County 17103 Central Amboy, Ashton, Binghampton, Dixon, Harmon, Rochelle
Livingston County 17105 Central Dwight, Fairbury, Forrest, Pontiac, Streator
Logan County 17107 Central Atlanta, Elkhart, Lincoln, Mount Pulaski
Macon County 17115 Central Decatur, Forsyth, Macon, Maroa, Mount Zion, Oakley, Warrensburg
Macoupin County 17117 Central Brighton, Carlinville, Girard, Staunton
Madison County 17119 Central Alton, Collinsville, East Alton, Edwardsville, Fairmont City, Godfrey, Granite City, Hamel, Hartford, Highland, Madison, Pontoon Beach, Roxana, South Roxana, Troy, Venice, Wood River, Worden
Marion County 17121 Central Centralia, Salem, Sandoval, Vernon, Walnut Hill
Marshall County 17123 Central Henry, Toluca, Washburn
Mason County 17125 Central Forest City, Havana, Manito, Mason City, Topeka
Massac County 17127 Central Joppa, Metropolis
McDonough County 17109 Central Bushnell, Colchester, Macomb
McHenry County 17111 Central Algonquin, Cary, Crystal Lake, Fox River Grove, Greenwood, Harvard, Hebron, Huntley, Johnsburg, Lake in the Hills, Lakemoor, Marengo, McHenry, Richmond, Ringwood, Spring Grove, Union, Woodstock
McLean County 17113 Central Bloomington, Bloomington, Chenoa, Danvers, El Paso, Ellsworth, Gridley, Heyworth, Le Roy, Lexington, Normal
Menard County 17129 Central Athens, Greenview, Petersburg
Mercer County 17131 Central Aledo, Alexis, Keithsburg, Sherrard
Monroe County 17133 Central Columbia, Valmeyer, Waterloo
Montgomery County 17135 Central Litchfield
Morgan County 17137 Central Alexander, Jacksonville, Meredosia
Moultrie County 17139 Central Arthur, Bethany, Sullivan
Ogle County 17141 Central Byron, Forreston, Holcomb, Lindenwood, Mount Morris, Oregon, Polo, Rochelle
Peoria County 17143 Central Bartonville, Brimfield, Chillicothe, Dunlap, Edwards, Elmwood, Mapleton, Mossville, Pekin, Peoria, Peoria Heights, Princeville, West Peoria
Perry County 17145 Central Du Quoin, Pinckneyville
Piatt County 17147 Central Cerro Gordo, Monticello
Pike County 17149 Central Barry, Detroit, Griggsville, Pittsfield
Pope County 17151 Central Herod
Pulaski County 17153 Central Olmsted
Putnam County 17155 Central Granville, Hennepin, Mark
Randolph County 17157 Central Baldwin, Chester, Evansville, Red Bud, Rockwood, Sparta, Steeleville
Richland County 17159 Central Olney
Rock Island County 17161 Central Andalusia, Coal Valley, Cordova, East Moline, Illinois City, Joslin, Milan, Moline, Oak Grove, Rock Island, Silvis
Saline County 17165 Central Carrier Mills, Eldorado, Harrisburg
Sangamon County 17167 Central Auburn, Illiopolis, Mechanicsburg, Pawnee, Pleasant Plains, Riverton, Rochester, Springfield
Scott County 17171 Central Bluffs, Winchester
Shelby County 17173 Central Findlay, Moweaqua, Shelbyville
St. Clair County 17163 Central Alorton, Belleville, Cahokia, Caseyville, Centreville, Columbia, Dupo, East Carondelet, East St. Louis, Fairmont City, Fairview Heights, Fayetteville, Freeburg, Lebanon, Marissa, Mascoutah, Millstadt, National City, O’Fallon, Sauget, Scott Air Force Base, Shiloh, Swansea, Washington Park
Stark County 17175 Central Bradford, La Fayette
Stephenson County 17177 Central Dakota, Freeport, Lena, Orangeville, Pearl City, Ridott, Rock City, Winslow
Tazewell County 17179 Central Creve Coeur, East Peoria, Mackinaw, Morton, Pekin, Tremont, Washington
Union County 17181 Central Anna, Dongola, Wolf Lake
Vermilion County 17183 Central Danville, Fairmount, Fithian, Georgetown, Hoopeston, Muncie, Rossville, Sidell, Tilton, Westville
Wabash County 17185 Central Mount Carmel
Warren County 17187 Central Alexis, Monmouth
Washington County 17189 Central Centralia, Nashville, Oakdale
Wayne County 17191 Central Fairfield, Johnsonville
White County 17193 Central Carmi, Grayville
Whiteside County 17195 Central Albany, Deer Grove, Erie, Fulton, Morrison, Prophetstown, Rock Falls, Sterling, Tampico
Will County 17197 Central Aurora, Beecher, Bolingbrook, Channahon, Crest Hill, Crete, Elwood, Fairmont, Frankfort, Homer Glen, Joliet, Lemont, Lockport, Manhattan, Matteson, Millsdale, Minooka, Mokena, Monee, Naperville, New Lenox, Orland Park, Park Forest, Peotone, Plainfield, Rockdale, Romeoville, Sauk Village, Shorewood, Tinley Park, University Park, Woodridge
Williamson County 17199 Central Creal Springs, Energy, Herrin, Marion
Winnebago County 17201 Central Durand, Loves Park, Machesney Park, Pecatonica, Rockford, Rockton, Roscoe, Seward, South Beloit, Winnebago
Woodford County 17203 Central Benson, El Paso, Goodfield, Metamora, Peoria Heights, Roanoke, Washburn
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