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Counties of Illinois

This is a list of the 102 counties in the state of Illinois. Information on the FIPS county code, county seat, year of establishment, origin, etymology, population, area and map of each county is included in the table below.

Contents

Etymologies

Many counties in the U.S. state of Illinois were named for early American leaders, especially of the American Revolutionary War, as well as soldiers from the Battle of Tippecanoe and the War of 1812. Several are named for natural features or counties in other states. Several are named for early Illinois leaders. Two counties are named for Native American tribes, and one bears the name of a plant used as a food-source by Native Americans.

Although Illinois has no "Lincoln County" named for its favorite son, Abraham Lincoln, it does have a Douglas County named for his political rival Stephen A. Douglas. It also has Calhoun County, named for John C. Calhoun, outspoken for his Confederate views in the years preceding the American Civil War. Many of the counties are named for Southerners, reflecting the fact that the State was originally a part of Virginia, and mainly settled by southerners. No counties are named for Northern heroes of the Civil War, mainly because the counties were almost all named before that War. The State even has a Lee County named after the family of Robert E. Lee, who at one time served in Illinois.

Alphabetical list

Note: the links in the FIPS County Code column are to the Census Bureau info page for that county.

County
 FIPS Code
[1]		 County seat
[2]		 Established
[2]		 Origin
 Etymology[3][4]
 Population
[2]		 Area
[2]		 Map
Adams County 001 Quincy 1825 Pike County John Quincy Adams (1767–1848), sixth President of the United States &0000000000068277.00000068,277 &0000000000000857.000000857 sq mi
(&0000000000002220.0000002,220 km2)		 State map highlighting Adams County
Alexander County 003 Cairo 1819 state of Missouri William M. Alexander, a settler and state representative in the Illinois General Assembly &0000000000009590.0000009,590 &0000000000000236.000000236 sq mi
(&0000000000000611.000000611 km2)		 State map highlighting Alexander County
Bond County 005 Greenville 1817 Crawford County, Edwards County, and Madison County Shadrach Bond (1773–1832), First Governor of Illinois &0000000000017633.00000017,633 &0000000000000380.000000380 sq mi
(&0000000000000984.000000984 km2)		 State map highlighting Bond County
Boone County 007 Belvidere 1837 Winnebago County Daniel Boone (1734-1820), trailblazer of the Wilderness Road in Kentucky &0000000000041786.00000041,786 &0000000000000281.000000281 sq mi
(&0000000000000728.000000728 km2)		 State map highlighting Boone County
Brown County 009 Mount Sterling 1839 Schuyler County Jacob Brown (1775–1828), a successful American Revolution army officer responsible for Great Lakes defenses &0000000000006950.0000006,950 &0000000000000306.000000306 sq mi
(&0000000000000793.000000793 km2)		 State map highlighting Brown County
Bureau County 011 Princeton 1837 Putnam County Pierre de Bureo, Frenchman, North American fur trader &0000000000035503.00000035,503 &0000000000000869.000000869 sq mi
(&0000000000002251.0000002,251 km2)		 State map highlighting Bureau County
Calhoun County 013 Hardin 1825 Pike County John C. Calhoun (1782–1850), South Carolina senator and seventh Vice President of the United States &0000000000005084.0000005,084 &0000000000000254.000000254 sq mi
(&0000000000000658.000000658 km2)		 State map highlighting Calhoun County
Carroll County 015 Mount Carroll 1839 Jo Daviess Charles Carroll of Carrollton (1737–1832), signed the Declaration of Independence on behalf of Maryland &0000000000016674.00000016,674 &0000000000000444.000000444 sq mi
(&0000000000001150.0000001,150 km2)		 State map highlighting Carroll County
Cass County 017 Virginia 1837 Morgan County Lewis Cass (1782–1866), second governor of Michigan Territory, fourteenth United States Secretary of War &0000000000013695.00000013,695 &0000000000000376.000000376 sq mi
(&0000000000000974.000000974 km2)		 State map highlighting Cass County
Champaign County 019 Urbana 1833 Vermilion County Champaign County, Ohio &0000000000179669.000000179,669 &0000000000000997.000000997 sq mi
(&0000000000002582.0000002,582 km2)		 State map highlighting Champaign County
Christian County 021 Taylorville 1839 Sangamon County Christian County, Kentucky &0000000000035372.00000035,372 &0000000000000709.000000709 sq mi
(&0000000000001836.0000001,836 km2)		 State map highlighting Christian County
Clark County 023 Marshall 1819 Crawford County George Rogers Clark (1752–1818), highest-ranking officer in the Northwest Territory during the American Revolution &0000000000017008.00000017,008 &0000000000000502.000000502 sq mi
(&0000000000001300.0000001,300 km2)		 State map highlighting Clark County
Clay County 025 Louisville 1824 Wayne, Lawrence, Fayette, and Crawford County Henry Clay (1777–1852), Kentucky legislator who negotiated the Missouri Compromise &0000000000014560.00000014,560 &0000000000000469.000000469 sq mi
(&0000000000001215.0000001,215 km2)		 State map highlighting Clay County
Clinton County 027 Carlyle 1824 Washington, Bond, and Fayette County DeWitt Clinton (1769–1828), Governor of New York, responsible for the construction of the Erie Canal &0000000000035535.00000035,535 &0000000000000474.000000474 sq mi
(&0000000000001228.0000001,228 km2)		 State map highlighting Clinton County
Coles County 029 Charleston 1830 Clark and Edgar County Edward Coles (1786–1868), second Governor of Illinois, responsible for the abolition of slavery in Illinois &0000000000053196.00000053,196 &0000000000000508.000000508 sq mi
(&0000000000001316.0000001,316 km2)		 State map highlighting Coles County
Cook County 031 Chicago 1831 Putnam County Daniel Pope Cook (1794–1827), politician and first Attorney General of Illinois &0000000005376741.0000005,376,741 &0000000000000946.000000946 sq mi
(&0000000000002450.0000002,450 km2)		 State map highlighting Cook County
Crawford County 033 Robinson 1816 Edwards County William H. Crawford (1772–1834), ninth United States Secretary of War, seventh Secretary of the Treasury &0000000000020452.00000020,452 &0000000000000444.000000444 sq mi
(&0000000000001150.0000001,150 km2)		 State map highlighting Crawford County
Cumberland County 035 Toledo 1843 Coles County Disputed: Cumberland Road, which entered the county; Cumberland, Maryland; or Cumberland River in Kentucky &0000000000011253.00000011,253 &0000000000000346.000000346 sq mi
(&0000000000000896.000000896 km2)		 State map highlighting Cumberland County
De Witt County 039 Clinton 1839 Macon and McLean County DeWitt Clinton (1769–1828), Governor of New York, responsible for the construction of the Erie Canal &0000000000016798.00000016,798 &0000000000000398.000000398 sq mi
(&0000000000001031.0000001,031 km2)		 State map highlighting De Witt County
DeKalb County 037 Sycamore 1837 Kane County Johann de Kalb (1721–1780), German soldier in the Continental Army who fought alongside Gilbert du Motier, marquis de Lafayette &0000000000088969.00000088,969 &0000000000000634.000000634 sq mi
(&0000000000001642.0000001,642 km2)		 State map highlighting DeKalb County
Douglas County 041 Tuscola 1859 Coles County Stephen A. Douglas (1813–1861), prominent Illinois Democrat who engaged in debates with Abraham Lincoln &0000000000019922.00000019,922 &0000000000000417.000000417 sq mi
(&0000000000001080.0000001,080 km2)		 State map highlighting Douglas County
DuPage County 043 Wheaton 1839 Cook County DuPage River &0000000000904161.000000904,161 &0000000000000334.000000334 sq mi
(&0000000000000865.000000865 km2)		 State map highlighting DuPage County
Edgar County 045 Paris 1823 Clark County John Edgar (c. 1750–1832), Illinois delegate to the Northwest Territory legislature; at time, wealthiest man in Illinois &0000000000019704.00000019,704 &0000000000000624.000000624 sq mi
(&0000000000001616.0000001,616 km2)		 State map highlighting Edgar County
Edwards County 047 Albion 1814 Gallatin County and Madison County Ninian Edwards (1775–1833), third Governor of the State of Illinois and only governor of the Illinois Territory &0000000000006971.0000006,971 &0000000000000222.000000222 sq mi
(&0000000000000575.000000575 km2)		 State map highlighting Edwards County
Effingham County 049 Effingham 1831 Fayette and Crawford County Lord Edward Effingham, military officer who resigned from the British Army to avoid fighting the American colonies &0000000000034264.00000034,264 &0000000000000479.000000479 sq mi
(&0000000000001241.0000001,241 km2)		 State map highlighting Effingham County
Fayette County 051 Vandalia 1821 Bond, Wayne, Clark, Jefferson, and Crawford County Marquis de la Fayette (1757–1834), French military officer who was a key factor in the American and French Revolutions. &0000000000021802.00000021,802 &0000000000000716.000000716 sq mi
(&0000000000001854.0000001,854 km2)		 State map highlighting Fayette County
Ford County 053 Paxton 1859 Kankakee County Thomas Ford (1800–1850), eighth Governor of Illinois; served during the Illinois Mormon War &0000000000014241.00000014,241 &0000000000000486.000000486 sq mi
(&0000000000001259.0000001,259 km2)		 State map highlighting Ford County
Franklin County 055 Benton 1818 White County and Gallatin County Benjamin Franklin (1706–1790), prolific writer, inventor, and politician; key factor in the American Revolution &0000000000039018.00000039,018 &0000000000000412.000000412 sq mi
(&0000000000001067.0000001,067 km2)		 State map highlighting Franklin County
Fulton County 057 Lewistown 1823 Pike County Robert Fulton (1765–1815), inventor of the steamboat &0000000000038250.00000038,250 &0000000000000866.000000866 sq mi
(&0000000000002243.0000002,243 km2)		 State map highlighting Fulton County
Gallatin County 059 Shawneetown 1812 Randolph County Albert Gallatin (1761–1849), fourth and longest-serving United States Secretary of the Treasury &0000000000006445.0000006,445 &0000000000000324.000000324 sq mi
(&0000000000000839.000000839 km2)		 State map highlighting Gallatin County
Greene County 061 Carrollton 1821 Madison County Nathanael Greene (1742–1786), major general in the Continental Army &0000000000014761.00000014,761 &0000000000000543.000000543 sq mi
(&0000000000001406.0000001,406 km2)		 State map highlighting Greene County
Grundy County 063 Morris 1841 LaSalle County Felix Grundy (1777–1840), Tennessean senator that served as the thirteenth United States Attorney General &0000000000037535.00000037,535 &0000000000000420.000000420 sq mi
(&0000000000001088.0000001,088 km2)		 State map highlighting Grundy County
Hamilton County 065 McLeansboro 1821 White County Alexander Hamilton (1755–1804), first United States Secretary of the Treasury &0000000000008621.0000008,621 &0000000000000435.000000435 sq mi
(&0000000000001127.0000001,127 km2)		 State map highlighting Hamilton County
Hancock County 067 Carthage 1825 Adams County John Hancock (1737–1793), first governor of the Massachusetts colony and president of the Second Continental Congress &0000000000020121.00000020,121 &0000000000000795.000000795 sq mi
(&0000000000002059.0000002,059 km2)		 State map highlighting Hancock County
Hardin County 069 Elizabethtown 1839 Pope County Hardin County, Kentucky &0000000000004800.0000004,800 &0000000000000178.000000178 sq mi
(&0000000000000461.000000461 km2)		 State map highlighting Hardin County
Henderson County 071 Oquawka 1841 Warren County Henderson County, Kentucky &0000000000008213.0000008,213 &0000000000000379.000000379 sq mi
(&0000000000000982.000000982 km2)		 State map highlighting Henderson County
Henry County 073 Cambridge 1825 Adams County Patrick Henry &0000000000051020.00000051,020 &0000000000000823.000000823 sq mi
(&0000000000002132.0000002,132 km2)		 State map highlighting Henry County
Iroquois County 075 Watseka 1833 Vermilion County Iroquois Native Americans &0000000000031334.00000031,334 &0000000000001116.0000001,116 sq mi
(&0000000000002890.0000002,890 km2)		 State map highlighting Iroquois County
Jackson County 077 Murphysboro 1816 Randolph County and Johnson County Andrew Jackson &0000000000059612.00000059,612 &0000000000000588.000000588 sq mi
(&0000000000001523.0000001,523 km2)		 State map highlighting Jackson County
Jasper County 079 Newton 1831 Clay and Crawford County William Jasper &0000000000010117.00000010,117 &0000000000000494.000000494 sq mi
(&0000000000001279.0000001,279 km2)		 State map highlighting Jasper County
Jefferson County 081 Mount Vernon 1819 Edwards and White County Thomas Jefferson &0000000000040045.00000040,045 &0000000000000571.000000571 sq mi
(&0000000000001479.0000001,479 km2)		 State map highlighting Jefferson County
Jersey County 083 Jerseyville 1839 Greene County State of New Jersey &0000000000021668.00000021,668 &0000000000000369.000000369 sq mi
(&0000000000000956.000000956 km2)		 State map highlighting Jersey County
Jo Daviess County 085 Galena 1827 Henry, Mercer, and Putnam County Joseph Hamilton Daviess &0000000000022289.00000022,289 &0000000000000601.000000601 sq mi
(&0000000000001557.0000001,557 km2)		 State map highlighting Jo Daviess County
Johnson County 087 Vienna 1812 Randolph County Richard Mentor Johnson &0000000000012878.00000012,878 &0000000000000346.000000346 sq mi
(&0000000000000896.000000896 km2)		 State map highlighting Johnson County
Kane County 089 Geneva 1836 Cook County Elias Kane &0000000000404119.000000404,119 &0000000000000521.000000521 sq mi
(&0000000000001349.0000001,349 km2)		 State map highlighting Kane County
Kankakee County 091 Kankakee 1853 Iroquois and Will County Kankakee River &0000000000103833.000000103,833 &0000000000000678.000000678 sq mi
(&0000000000001756.0000001,756 km2)		 State map highlighting Kankakee County
Kendall County 093 Yorkville 1841 LaSalle and Kane County Amos Kendall &0000000000054544.00000054,544 &0000000000000321.000000321 sq mi
(&0000000000000831.000000831 km2)		 State map highlighting Kendall County
Knox County 095 Galesburg 1825 Fulton County Gen. Henry Knox &0000000000055836.00000055,836 &0000000000000716.000000716 sq mi
(&0000000000001854.0000001,854 km2)		 State map highlighting Knox County
Lake County 097 Waukegan 1839 McHenry County Lakes populating the county &0000000000644356.000000644,356 &0000000000000448.000000448 sq mi
(&0000000000001160.0000001,160 km2)		 State map highlighting Lake County
LaSalle County 099 Ottawa 1831 Putnam County Sieur de la Salle &0000000000111509.000000111,509 &0000000000001135.0000001,135 sq mi
(&0000000000002940.0000002,940 km2)		 State map highlighting LaSalle County
Lawrence County 101 Lawrenceville 1821 Crawford and Edwards County James Lawrence &0000000000015452.00000015,452 &0000000000000372.000000372 sq mi
(&0000000000000963.000000963 km2)		 State map highlighting Lawrence County
Lee County 103 Dixon 1839 Ogle County Lighthorse Harry Lee &0000000000036062.00000036,062 &0000000000000725.000000725 sq mi
(&0000000000001878.0000001,878 km2)		 State map highlighting Lee County
Livingston County 105 Pontiac 1837 LaSalle and McLean County Edward Livingston &0000000000039678.00000039,678 &0000000000001044.0000001,044 sq mi
(&0000000000002704.0000002,704 km2)		 State map highlighting Livingston County
Logan County 107 Lincoln 1839 Sangamon County John A. Logan &0000000000031183.00000031,183 &0000000000000618.000000618 sq mi
(&0000000000001601.0000001,601 km2)		 State map highlighting Logan County
Macon County 115 Decatur 1829 Shelby County Nathaniel Macon &0000000000114706.000000114,706 &0000000000000581.000000581 sq mi
(&0000000000001505.0000001,505 km2)		 State map highlighting Macon County
Macoupin County 117 Carlinville 1829 Greene County Native American word Macoupin &0000000000049019.00000049,019 &0000000000000864.000000864 sq mi
(&0000000000002238.0000002,238 km2)		 State map highlighting Macoupin County
Madison County 119 Edwardsville 1812 St. Clair County and Randolph County James Madison &0000000000258941.000000258,941 &0000000000000725.000000725 sq mi
(&0000000000001878.0000001,878 km2)		 State map highlighting Madison County
Marion County 121 Salem 1823 Fayette and Jefferson County Francis Marion &0000000000041691.00000041,691 &0000000000000572.000000572 sq mi
(&0000000000001481.0000001,481 km2)		 State map highlighting Marion County
Marshall County 123 Lacon 1839 Putnam County John Marshall &0000000000013180.00000013,180 &0000000000000386.000000386 sq mi
(&0000000000001000.0000001,000 km2)		 State map highlighting Marshall County
Mason County 125 Havana 1841 Tazewell and Menard County George Mason &0000000000016038.00000016,038 &0000000000000539.000000539 sq mi
(&0000000000001396.0000001,396 km2)		 State map highlighting Mason County
Massac County 127 Metropolis 1843 Pope and Johnson County Fort Massac &0000000000015161.00000015,161 &0000000000000239.000000239 sq mi
(&0000000000000619.000000619 km2)		 State map highlighting Massac County
McDonough County 109 Macomb 1826 Schuyler County Commodore Thomas McDonough &0000000000032913.00000032,913 &0000000000000589.000000589 sq mi
(&0000000000001526.0000001,526 km2)		 State map highlighting McDonough County
McHenry County 111 Woodstock 1836 Cook County Gen. William McHenry &0000000000260077.000000260,077 &0000000000000604.000000604 sq mi
(&0000000000001564.0000001,564 km2)		 State map highlighting McHenry County
McLean County 113 Bloomington 1830 Tazewell County John McLean &0000000000150433.000000150,433 &0000000000001184.0000001,184 sq mi
(&0000000000003067.0000003,067 km2)		 State map highlighting McLean County
Menard County 129 Petersburg 1839 Sangamon County Pierre Menard &0000000000012486.00000012,486 &0000000000000314.000000314 sq mi
(&0000000000000813.000000813 km2)		 State map highlighting Menard County
Mercer County 131 Aledo 1825 Schuyler County Hugh Mercer &0000000000016957.00000016,957 &0000000000000561.000000561 sq mi
(&0000000000001453.0000001,453 km2)		 State map highlighting Mercer County
Monroe County 133 Waterloo 1816 Randolph County and St. Clair County James Monroe &0000000000027619.00000027,619 &0000000000000388.000000388 sq mi
(&0000000000001005.0000001,005 km2)		 State map highlighting Monroe County
Montgomery County 135 Hillsboro 1821 Bond and Madison County Richard Montgomery &0000000000030652.00000030,652 &0000000000000704.000000704 sq mi
(&0000000000001823.0000001,823 km2)		 State map highlighting Montgomery County
Morgan County 137 Jacksonville 1823 Sangamon County Daniel Morgan &0000000000036616.00000036,616 &0000000000000569.000000569 sq mi
(&0000000000001474.0000001,474 km2)		 State map highlighting Morgan County
Moultrie County 139 Sullivan 1843 Shelby and Macon County William Moultrie &0000000000014287.00000014,287 &0000000000000336.000000336 sq mi
(&0000000000000870.000000870 km2)		 State map highlighting Moultrie County
Ogle County 141 Oregon 1836 Jo Daviess Joseph Ogle &0000000000051032.00000051,032 &0000000000000759.000000759 sq mi
(&0000000000001966.0000001,966 km2)		 State map highlighting Ogle County
Peoria County 143 Peoria 1825 Fulton County Native American Peoria &0000000000183433.000000183,433 &0000000000000620.000000620 sq mi
(&0000000000001606.0000001,606 km2)		 State map highlighting Peoria County
Perry County 145 Pinckneyville 1827 Randolph and Jackson County Oliver Hazard Perry &0000000000023094.00000023,094 &0000000000000441.000000441 sq mi
(&0000000000001142.0000001,142 km2)		 State map highlighting Perry County
Piatt County 147 Monticello 1841 De Witt and Macon County John Piatt &0000000000016365.00000016,365 &0000000000000440.000000440 sq mi
(&0000000000001140.0000001,140 km2)		 State map highlighting Piatt County
Pike County 149 Pittsfield 1821 Madison, Bond, and Clark County Zebulon Pike &0000000000017384.00000017,384 &0000000000000830.000000830 sq mi
(&0000000000002150.0000002,150 km2)		 State map highlighting Pike County
Pope County 151 Golconda 1816 Gallatin and Johnson County Nathaniel Pope &0000000000004413.0000004,413 &0000000000000371.000000371 sq mi
(&0000000000000961.000000961 km2)		 State map highlighting Pope County
Pulaski County 153 Mound City 1843 Alexander and Johnson County Kazimierz Pulaski &0000000000007348.0000007,348 &0000000000000201.000000201 sq mi
(&0000000000000521.000000521 km2)		 State map highlighting Pulaski County
Putnam County 155 Hennepin 1825 Peoria County Israel Putnam &0000000000006086.0000006,086 &0000000000000160.000000160 sq mi
(&0000000000000414.000000414 km2)		 State map highlighting Putnam County
Randolph County 157 Chester 1795 St. Clair County Edmund Randolph &0000000000033893.00000033,893 &0000000000000578.000000578 sq mi
(&0000000000001497.0000001,497 km2)		 State map highlighting Randolph County
Richland County 159 Olney 1841 Clay and Lawrence County Richland County, Ohio &0000000000016149.00000016,149 &0000000000000360.000000360 sq mi
(&0000000000000932.000000932 km2)		 State map highlighting Richland County
Rock Island County 161 Rock Island 1831 Jo Daviess County Rock Island &0000000000149374.000000149,374 &0000000000000427.000000427 sq mi
(&0000000000001106.0000001,106 km2)		 State map highlighting Rock Island County
Saline County 165 Harrisburg 1847 Gallatin County Salt springs within the county &0000000000026733.00000026,733 &0000000000000383.000000383 sq mi
(&0000000000000992.000000992 km2)		 State map highlighting Saline County
Sangamon County 167 Springfield 1821 Madison and Bond County Sangamon River &0000000000188951.000000188,951 &0000000000000868.000000868 sq mi
(&0000000000002248.0000002,248 km2)		 State map highlighting Sangamon County
Schuyler County 169 Rushville 1825 Pike and Fulton County Philip Schuyler &0000000000007189.0000007,189 &0000000000000437.000000437 sq mi
(&0000000000001132.0000001,132 km2)		 State map highlighting Schuyler County
Scott County 171 Winchester 1839 Morgan County Scott family &0000000000005537.0000005,537 &0000000000000251.000000251 sq mi
(&0000000000000650.000000650 km2)		 State map highlighting Scott County
Shelby County 173 Shelbyville 1827 Fayette County Isaac Shelby &0000000000022893.00000022,893 &0000000000000759.000000759 sq mi
(&0000000000001966.0000001,966 km2)		 State map highlighting Shelby County
St. Clair County 163 Belleville 1790 original two counties Arthur St. Clair &0000000000256082.000000256,082 &0000000000000664.000000664 sq mi
(&0000000000001720.0000001,720 km2)		 State map highlighting St. Clair County
Stark County 175 Toulon 1839 Knox and Putnam County John Stark &0000000000006332.0000006,332 &0000000000000288.000000288 sq mi
(&0000000000000746.000000746 km2)		 State map highlighting Stark County
Stephenson County 177 Freeport 1837 Jo Daviess and Winnebago County Benjamin Stephenson &0000000000048979.00000048,979 &0000000000000564.000000564 sq mi
(&0000000000001461.0000001,461 km2)		 State map highlighting Stephenson County
Tazewell County 179 Pekin 1827 Sangamon County Littleton Waller Tazewell &0000000000128485.000000128,485 &0000000000000649.000000649 sq mi
(&0000000000001681.0000001,681 km2)		 State map highlighting Tazewell County
Union County 181 Jonesboro 1818 Johnson County federal union &0000000000018293.00000018,293 &0000000000000416.000000416 sq mi
(&0000000000001077.0000001,077 km2)		 State map highlighting Union County
Vermilion County 183 Danville 1826 Clark and Edgar County Vermilion River &0000000000083919.00000083,919 &0000000000000899.000000899 sq mi
(&0000000000002328.0000002,328 km2)		 State map highlighting Vermilion County
Wabash County 185 Mount Carmel 1824 Edwards County Wabash River &0000000000012937.00000012,937 &0000000000000224.000000224 sq mi
(&0000000000000580.000000580 km2)		 State map highlighting Wabash County
Warren County 187 Monmouth 1825 Schuyler County Joseph Warren &0000000000018735.00000018,735 &0000000000000543.000000543 sq mi
(&0000000000001406.0000001,406 km2)		 State map highlighting Warren County
Washington County 189 Nashville 1818 St. Clair County George Washington &0000000000015148.00000015,148 &0000000000000563.000000563 sq mi
(&0000000000001458.0000001,458 km2)		 State map highlighting Washington County
Wayne County 191 Fairfield 1819 Edwards County Gen. "Mad" Anthony Wayne &0000000000017151.00000017,151 &0000000000000714.000000714 sq mi
(&0000000000001849.0000001,849 km2)		 State map highlighting Wayne County
White County 193 Carmi 1815 Gallatin County Isaac White &0000000000015371.00000015,371 &0000000000000495.000000495 sq mi
(&0000000000001282.0000001,282 km2)		 State map highlighting White County
Whiteside County 195 Morrison 1836 Jo Daviess and Henry County Samuel Whiteside &0000000000060653.00000060,653 &0000000000000685.000000685 sq mi
(&0000000000001774.0000001,774 km2)		 State map highlighting Whiteside County
Will County 197 Joliet 1836 Cook and Iroquois County Conrad Will &0000000000502266.000000502,266 &0000000000000837.000000837 sq mi
(&0000000000002168.0000002,168 km2)		 State map highlighting Will County
Williamson County 199 Marion 1839 Franklin County Hugh Williamson &0000000000061296.00000061,296 &0000000000000424.000000424 sq mi
(&0000000000001098.0000001,098 km2)		 State map highlighting Williamson County
Winnebago County 201 Rockford 1836 Jo Daviess Winnebago Native Americans &0000000000278418.000000278,418 &0000000000000514.000000514 sq mi
(&0000000000001331.0000001,331 km2)		 State map highlighting Winnebago County
Woodford County 203 Eureka 1841 Tazewell and McLean County William Woodford &0000000000035469.00000035,469 &0000000000000528.000000528 sq mi
(&0000000000001368.0000001,368 km2)		 State map highlighting Woodford County

Defunct counties

See also

Illinois portal

References

  1. ^ "EPA County FIPS Code Listing". EPA.gov. http://www.naco.org/Template.cfm?Section=Find_a_County&Template=/cffiles/counties/state.cfm&statecode=il. Retrieved 2008-02-23. 
  2. ^ a b c d National Association of Counties. "NACo - Find a county". http://www.naco.org/Template.cfm?Section=Find_a_County&Template=/cffiles/counties/state.cfm&state.cfm&statecode=VA. Retrieved 2007-04-26. 
  3. ^ "Illinois County Biographies". Genealogy Trails.com. Genealogy Trails. 2000. http://genealogytrails.com/ill/cobiosad.htm. Retrieved 2008-09-21. 
  4. ^ "The Origin of Illinois County Names". Genealogy Trails.com. Genealogy Trails. 2000. http://genealogytrails.com/ill/ilcohx.htm. Retrieved 2008-09-21. 

External links


 
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Up to date as of February 01, 2010

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The links in the column FIPS County Code are to the Census Bureau Info page for that county. Listed are the 102 counties in the state of Illinois.

Contents

Current counties

Illinois counties
State Abbr. FIPS State Code State
IL 17 Illinois
FIPS County Code County Name (County Seat)
001 Adams County (Quincy)
003 Alexander County (Cairo)
005 Bond County (Greenville)
007 Boone County (Belvidere)
009 Brown County (Mount Sterling)
011 Bureau County (Princeton)
013 Calhoun County (Hardin)
015 Carroll County (Mount Carroll)
017 Cass County (Virginia)
019 Champaign County (Urbana)
021 Christian County (Taylorville)
023 Clark County (Marshall)
025 Clay County (Louisville)
027 Clinton County (Carlyle)
029 Coles County (Charleston)
031 Cook County (Chicago)
033 Crawford County (Robinson)
035 Cumberland County (Toledo)
037 DeKalb County (Sycamore)
039 De Witt County (Clinton)
041 Douglas County (Tuscola)
State Abbr. FIPS State Code State
IL 17 Illinois
FIPS County Code County Name (County Seat)
043 DuPage County (Wheaton)
045 Edgar County (Paris)
047 Edwards County (Albion)
049 Effingham County (Effingham)
051 Fayette County (Vandalia)
053 Ford County (Paxton)
055 Franklin County (Benton)
057 Fulton County (Lewistown)
059 Gallatin County (Shawneetown)
061 Greene County (Carrollton)
063 Grundy County (Morris)
065 Hamilton County (McLeansboro)
067 Hancock County (Carthage)
069 Hardin County (Elizabethtown)
071 Henderson County (Oquawka)
073 Henry County (Cambridge)
075 Iroquois County (Watseka)
077 Jackson County (Murphysboro)
079 Jasper County (Newton)
081 Jefferson County (Mount Vernon)
083 Jersey County (Jerseyville)
085 Jo Daviess County (Galena)
087 Johnson County (Vienna)
089 Kane County (Geneva)
091 Kankakee County (Kankakee)
093 Kendall County (Yorkville)
095 Knox County (Galesburg)
State Abbr. FIPS State Code State
IL 17 Illinois
FIPS County Code County Name (County Seat)
097 Lake County (Waukegan)
099 LaSalle County (Ottawa)
101 Lawrence County (Lawrenceville)
103 Lee County (Dixon)
105 Livingston County (Pontiac)
107 Logan County (Lincoln)
109 McDonough County (Macomb)
111 McHenry County (Woodstock)
113 McLean County (Bloomington)
115 Macon County (Decatur)
117 Macoupin County (Carlinville)
119 Madison County (Edwardsville)
121 Marion County (Salem)
123 Marshall County (Lacon)
125 Mason County (Havana)
127 Massac County (Metropolis)
129 Menard County (Petersburg)
131 Mercer County (Aledo)
133 Monroe County (Waterloo)
135 Montgomery County (Hillsboro)
137 Morgan County (Jacksonville)
139 Moultrie County (Sullivan)
141 Ogle County (Oregon)
143 Peoria County (Peoria)
145 Perry County (Pinckneyville)
147 Piatt County (Monticello)
149 Pike County (Pittsfield)
151 Pope County (Golconda)
State Abbr. FIPS State Code State
IL 17 Illinois
FIPS County Code County Name (County Seat)
153 Pulaski County (Mound City)
155 Putnam County (Hennepin)
157 Randolph County (Chester)
159 Richland County (Olney)
161 Rock Island County (Rock Island)
163 St. Clair County (Belleville)
165 Saline County (Harrisburg)
167 Sangamon County (Springfield)
169 Schuyler County (Rushville)
171 Scott County (Winchester)
173 Shelby County (Shelbyville)
175 Stark County (Toulon)
177 Stephenson County (Freeport)
179 Tazewell County (Pekin)
181 Union County (Jonesboro)
183 Vermilion County (Danville)
185 Wabash County (Mount Carmel)
187 Warren County (Monmouth)
189 Washington County (Nashville)
191 Wayne County (Fairfield)
193 White County (Carmi)
195 Whiteside County (Morrison)
197 Will County (Joliet)
199 Williamson County (Marion)
201 Winnebago County (Rockford)
203 Woodford County (Eureka)

Defunct counties

See also

External links and sources

Lists of counties in the United States
(parishes in Louisiana; boroughs and census areas in Alaska)

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This page uses content from the English language Wikipedia. The original content was at List of counties in Illinois. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.

This article uses material from the "List of counties in Illinois" article on the Genealogy wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.







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