Download Excel File List of Counties in Illinois

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S.No.,County,FIPS code ,County seat ,Population ,Area ,Est. ,Origin1,Adams County,001,Quincy,"64,954","855sqmi(2,214km)",1825,Pike County2,Alexander County,003,Cairo,"5,030","236sqmi(611km)",1819,Union County3,Bond County,005,Greenville,"16,596","380sqmi(984km)",1817,"Crawford County, Edwards County, and Madison County"4,Boone County,007,Belvidere,"53,159","280sqmi(725km)",1837,Winnebago County5,Brown County,009,Mount Sterling,"6,421","305sqmi(790km)",1839,Schuyler County6,Bureau County,011,Princeton,"32,883","869sqmi(2,251km)",1837,Putnam County7,Calhoun County,013,Hardin,"4,369","253sqmi(655km)",1825,Pike County8,Carroll County,015,Mount Carroll,"15,698","445sqmi(1,153km)",1839,Jo Daviess9,Cass County,017,Virginia,"12,773","375sqmi(971km)",1837,Morgan County10,Champaign County,019,Urbana,"205,943","996sqmi(2,580km)",1833,Vermilion County11,Christian County,021,Taylorville,"33,662","709sqmi(1,836km)",1839,Sangamon County12,Clark County,023,Marshall,"15,300","501sqmi(1,298km)",1819,Crawford County13,Clay County,025,Louisville,"13,143","468sqmi(1,212km)",1824,"Wayne, Lawrence, Fayette, and Crawford County"14,Clinton County,027,Carlyle,"36,793","474sqmi(1,228km)",1824,"Washington, Bond, and Fayette County"15,Coles County,029,Charleston,"46,765","508sqmi(1,316km)",1830,Clark and Edgar County16,Cook County,031,Chicago,"5,173,146","944sqmi(2,445km)",1831,Putnam County17,Crawford County,033,Robinson,"18,659","443sqmi(1,147km)",1816,Edwards County18,Cumberland County,035,Toledo,"10,345","345sqmi(894km)",1843,Coles County19,DeKalb County,037,Sycamore,"100,414","631sqmi(1,634km)",1837,Kane County20,DeWitt County,039,Clinton,"15,341","397sqmi(1,028km)",1839,Macon and McLean County21,Douglas County,041,Tuscola,"19,722","416sqmi(1,077km)",1859,Coles County22,DuPage County,043,Wheaton,"924,885","327sqmi(847km)",1839,Cook County23,Edgar County,045,Paris,"16,520","623sqmi(1,614km)",1823,Clark County24,Edwards County,047,Albion,"6,075","222sqmi(575km)",1814,Gallatin County and Madison County25,Effingham County,049,Effingham,"34,430","478sqmi(1,238km)",1831,Fayette and Crawford County26,Fayette County,051,Vandalia,"21,384","716sqmi(1,854km)",1821,"Bond, Wayne, Clark, Jefferson, and Crawford County"27,Ford County,053,Paxton,"13,511","485sqmi(1,256km)",1859,Vermilion County28,Franklin County,055,Benton,"37,442","408sqmi(1,057km)",1818,White County and Gallatin County29,Fulton County,057,Lewistown,"33,197","865sqmi(2,240km)",1823,Pike County30,Gallatin County,059,Shawneetown,"4,903","322sqmi(834km)",1812,Randolph County31,Greene County,061,Carrollton,"11,843","543sqmi(1,406km)",1821,Madison County32,Grundy County,063,Morris,"52,989","418sqmi(1,083km)",1841,LaSalle County33,Hamilton County,065,McLeansboro,"7,911","434sqmi(1,124km)",1821,White County34,Hancock County,067,Carthage,"17,400","793sqmi(2,054km)",1825,Adams County35,Hardin County,069,Elizabethtown,"3,650","177sqmi(458km)",1839,Pope County36,Henderson County,071,Oquawka,"6,312","378sqmi(979km)",1841,Warren County37,Henry County,073,Cambridge,"48,907","822sqmi(2,129km)",1825,Fulton County38,Iroquois County,075,Watseka,"26,827","1,117sqmi(2,893km)",1833,Vermilion County39,Jackson County,077,Murphysboro,"52,565","584sqmi(1,513km)",1816,Randolph County and Johnson County40,Jasper County,079,Newton,"9,193","494sqmi(1,279km)",1831,Clay and Crawford County41,Jefferson County,081,Mount Vernon,"36,877","571sqmi(1,479km)",1819,Edwards and White County42,Jersey County,083,Jerseyville,"21,333","369sqmi(956km)",1839,Greene County43,Jo Daviess County,085,Galena,"21,939","600sqmi(1,554km)",1827,"Henry, Mercer, and Putnam County"44,Johnson County,087,Vienna,"13,463","343sqmi(888km)",1812,Randolph County45,Kane County,089,Geneva,"515,588","519sqmi(1,344km)",1836,LaSalle County46,Kankakee County,091,Kankakee,"106,601","676sqmi(1,751km)",1853,Iroquois and Will County47,Kendall County,093,Yorkville,"134,867","320sqmi(829km)",1841,LaSalle and Kane County48,Knox County,095,Galesburg,"49,268","716sqmi(1,854km)",1825,Fulton County49,Lake County,097,Waukegan,"711,239","443sqmi(1,147km)",1839,McHenry County50,LaSalle County,099,Ottawa,"108,965","1,135sqmi(2,940km)",1831,Putnam and Tazewell County51,Lawrence County,101,Lawrenceville,"15,152","372sqmi(963km)",1821,Crawford and Edwards County52,Lee County,103,Dixon,"34,049","724sqmi(1,875km)",1839,Ogle County53,Livingston County,105,Pontiac,"35,664","1,043sqmi(2,701km)",1837,LaSalle and McLean County54,Logan County,107,Lincoln,"27,992","618sqmi(1,601km)",1839,Sangamon County55,Macon County,115,Decatur,"102,432","580sqmi(1,502km)",1829,Shelby County56,Macoupin County,117,Carlinville,"44,406","862sqmi(2,233km)",1829,Greene County57,Madison County,119,Edwardsville,"264,490","716sqmi(1,854km)",1812,St. Clair County and Randolph County58,Marion County,121,Salem,"37,390","572sqmi(1,481km)",1823,Fayette and Jefferson County59,Marshall County,123,Lacon,"11,663","386sqmi(1,000km)",1839,Putnam County60,Mason County,125,Havana,"12,881","539sqmi(1,396km)",1841,Tazewell and Menard County61,Massac County,127,Metropolis,"13,960","237sqmi(614km)",1843,Pope and Johnson County62,McDonough County,109,Macomb,"26,828","589sqmi(1,526km)",1826,Schuyler County63,McHenry County,111,Woodstock,"311,122","603sqmi(1,562km)",1836,Cook and LaSalle County64,McLean County,113,Bloomington,"170,889","1,183sqmi(3,064km)",1830,Tazewell County65,Menard County,129,Petersburg,"12,164","314sqmi(813km)",1839,Sangamon County66,Mercer County,131,Aledo,"15,582","561sqmi(1,453km)",1825,Schuyler County67,Monroe County,133,Waterloo,"34,932","385sqmi(997km)",1816,Randolph County and St. Clair County68,Montgomery County,135,Hillsboro,"28,084","703sqmi(1,821km)",1821,Bond and Madison County69,Morgan County,137,Jacksonville,"32,606","568sqmi(1,471km)",1823,Sangamon County70,Moultrie County,139,Sullivan,"14,510","335sqmi(868km)",1843,Shelby and Macon County71,Ogle County,141,Oregon,"51,449","758sqmi(1,963km)",1836,Jo Daviess72,Peoria County,143,Peoria,"179,432","618sqmi(1,601km)",1825,Fulton County73,Perry County,145,Pinckneyville,"20,985","441sqmi(1,142km)",1827,Randolph and Jackson County74,Piatt County,147,Monticello,"16,753","439sqmi(1,137km)",1841,DeWitt and Macon County75,Pike County,149,Pittsfield,"14,618","831sqmi(2,152km)",1821,"Madison, Bond, and Clark County"76,Pope County,151,Golconda,"3,779","368sqmi(953km)",1816,Gallatin and Johnson County77,Pulaski County,153,Mound City,"5,065","199sqmi(515km)",1843,Alexander and Johnson County78,Putnam County,155,Hennepin,"5,566","160sqmi(414km)",1825,Fulton County79,Randolph County,157,Chester,"30,142","575sqmi(1,489km)",1795,St. Clair County80,Richland County,159,Olney,"15,796","360sqmi(932km)",1841,Clay and Lawrence County81,Rock Island County,161,Rock Island,"142,909","427sqmi(1,106km)",1831,Jo Daviess County82,Saline County,165,Harrisburg,"23,320","379sqmi(982km)",1847,Gallatin County83,Sangamon County,167,Springfield,"194,734","868sqmi(2,248km)",1821,Madison and Bond County84,Schuyler County,169,Rushville,"6,843","437sqmi(1,132km)",1825,Pike and Fulton County85,Scott County,171,Winchester,"4,836","250sqmi(647km)",1839,Morgan County86,Shelby County,173,Shelbyville,"20,789","758sqmi(1,963km)",1827,Fayette County87,St. Clair County,163,Belleville,"254,796","657sqmi(1,702km)",1790,original two counties88,Stark County,175,Toulon,"5,294","288sqmi(746km)",1839,Knox and Putnam County89,Stephenson County,177,Freeport,"44,021","564sqmi(1,461km)",1837,Jo Daviess and Winnebago County90,Tazewell County,179,Pekin,"130,413","646sqmi(1,673km)",1827,Sangamon County91,Union County,181,Jonesboro,"16,923","413sqmi(1,070km)",1818,Johnson County92,Vermilion County,183,Danville,"73,095","898sqmi(2,326km)",1826,Edgar County93,Wabash County,185,Mount Carmel,"11,202","223sqmi(578km)",1824,Edwards County94,Warren County,187,Monmouth,"16,531","542sqmi(1,404km)",1825,Schuyler County95,Washington County,189,Nashville,"13,655","562sqmi(1,456km)",1818,St. Clair County96,Wayne County,191,Fairfield,"15,963","713sqmi(1,847km)",1819,Edwards County97,White County,193,Carmi,"13,784","494sqmi(1,279km)",1815,Gallatin County98,Whiteside County,195,Morrison,"55,305","684sqmi(1,772km)",1836,Jo Daviess and Henry County99,Will County,197,Joliet,"697,252","835sqmi(2,163km)",1836,Cook and Iroquois County100,Williamson County,199,Marion,"66,879","420sqmi(1,088km)",1839,Franklin County101,Winnebago County,201,Rockford,"283,119","513sqmi(1,329km)",1836,Jo Daviess County102,Woodford County,203,Eureka,"38,225","527sqmi(1,365km)",1841,Tazewell and McLean County,,,,,,,https://www.downloadexcelfiles.com/,,,,,,,