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 1 Etymologies 2 Alphabetical list 3 Defunct counties 4 See also 5 References 6 External links

[edit] 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.

[edit] 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)
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)
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)
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)
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)
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)
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)
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)
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)
Champaign County	019	Urbana	1833	Vermilion County	Champaign County, Ohio	&0000000000179669.000000179,669	&0000000000000997.000000997 sq mi (&0000000000002582.0000002,582 km2)
Christian County	021	Taylorville	1839	Sangamon County	Christian County, Kentucky	&0000000000035372.00000035,372	&0000000000000709.000000709 sq mi (&0000000000001836.0000001,836 km2)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
DuPage County	043	Wheaton	1839	Cook County	DuPage River	&0000000000904161.000000904,161	&0000000000000334.000000334 sq mi (&0000000000000865.000000865 km2)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
Hardin County	069	Elizabethtown	1839	Pope County	Hardin County, Kentucky	&0000000000004800.0000004,800	&0000000000000178.000000178 sq mi (&0000000000000461.000000461 km2)
Henderson County	071	Oquawka	1841	Warren County	Henderson County, Kentucky	&0000000000008213.0000008,213	&0000000000000379.000000379 sq mi (&0000000000000982.000000982 km2)
Henry County	073	Cambridge	1825	Adams County	Patrick Henry	&0000000000051020.00000051,020	&0000000000000823.000000823 sq mi (&0000000000002132.0000002,132 km2)
Iroquois County	075	Watseka	1833	Vermilion County	Iroquois Native Americans	&0000000000031334.00000031,334	&0000000000001116.0000001,116 sq mi (&0000000000002890.0000002,890 km2)
Jackson County	077	Murphysboro	1816	Randolph County and Johnson County	Andrew Jackson	&0000000000059612.00000059,612	&0000000000000588.000000588 sq mi (&0000000000001523.0000001,523 km2)
Jasper County	079	Newton	1831	Clay and Crawford County	William Jasper	&0000000000010117.00000010,117	&0000000000000494.000000494 sq mi (&0000000000001279.0000001,279 km2)
Jefferson County	081	Mount Vernon	1819	Edwards and White County	Thomas Jefferson	&0000000000040045.00000040,045	&0000000000000571.000000571 sq mi (&0000000000001479.0000001,479 km2)
Jersey County	083	Jerseyville	1839	Greene County	State of New Jersey	&0000000000021668.00000021,668	&0000000000000369.000000369 sq mi (&0000000000000956.000000956 km2)
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)
Johnson County	087	Vienna	1812	Randolph County	Richard Mentor Johnson	&0000000000012878.00000012,878	&0000000000000346.000000346 sq mi (&0000000000000896.000000896 km2)
Kane County	089	Geneva	1836	Cook County	Elias Kane	&0000000000404119.000000404,119	&0000000000000521.000000521 sq mi (&0000000000001349.0000001,349 km2)
Kankakee County	091	Kankakee	1853	Iroquois and Will County	Kankakee River	&0000000000103833.000000103,833	&0000000000000678.000000678 sq mi (&0000000000001756.0000001,756 km2)
Kendall County	093	Yorkville	1841	LaSalle and Kane County	Amos Kendall	&0000000000054544.00000054,544	&0000000000000321.000000321 sq mi (&0000000000000831.000000831 km2)
Knox County	095	Galesburg	1825	Fulton County	Gen. Henry Knox	&0000000000055836.00000055,836	&0000000000000716.000000716 sq mi (&0000000000001854.0000001,854 km2)
Lake County	097	Waukegan	1839	McHenry County	Lakes populating the county	&0000000000644356.000000644,356	&0000000000000448.000000448 sq mi (&0000000000001160.0000001,160 km2)
LaSalle County	099	Ottawa	1831	Putnam County	Sieur de la Salle	&0000000000111509.000000111,509	&0000000000001135.0000001,135 sq mi (&0000000000002940.0000002,940 km2)
Lawrence County	101	Lawrenceville	1821	Crawford and Edwards County	James Lawrence	&0000000000015452.00000015,452	&0000000000000372.000000372 sq mi (&0000000000000963.000000963 km2)
Lee County	103	Dixon	1839	Ogle County	Lighthorse Harry Lee	&0000000000036062.00000036,062	&0000000000000725.000000725 sq mi (&0000000000001878.0000001,878 km2)
Livingston County	105	Pontiac	1837	LaSalle and McLean County	Edward Livingston	&0000000000039678.00000039,678	&0000000000001044.0000001,044 sq mi (&0000000000002704.0000002,704 km2)
Logan County	107	Lincoln	1839	Sangamon County	John A. Logan	&0000000000031183.00000031,183	&0000000000000618.000000618 sq mi (&0000000000001601.0000001,601 km2)
Macon County	115	Decatur	1829	Shelby County	Nathaniel Macon	&0000000000114706.000000114,706	&0000000000000581.000000581 sq mi (&0000000000001505.0000001,505 km2)
Macoupin County	117	Carlinville	1829	Greene County	Native American word Macoupin	&0000000000049019.00000049,019	&0000000000000864.000000864 sq mi (&0000000000002238.0000002,238 km2)
Madison County	119	Edwardsville	1812	St. Clair County and Randolph County	James Madison	&0000000000258941.000000258,941	&0000000000000725.000000725 sq mi (&0000000000001878.0000001,878 km2)
Marion County	121	Salem	1823	Fayette and Jefferson County	Francis Marion	&0000000000041691.00000041,691	&0000000000000572.000000572 sq mi (&0000000000001481.0000001,481 km2)
Marshall County	123	Lacon	1839	Putnam County	John Marshall	&0000000000013180.00000013,180	&0000000000000386.000000386 sq mi (&0000000000001000.0000001,000 km2)
Mason County	125	Havana	1841	Tazewell and Menard County	George Mason	&0000000000016038.00000016,038	&0000000000000539.000000539 sq mi (&0000000000001396.0000001,396 km2)
Massac County	127	Metropolis	1843	Pope and Johnson County	Fort Massac	&0000000000015161.00000015,161	&0000000000000239.000000239 sq mi (&0000000000000619.000000619 km2)
McDonough County	109	Macomb	1826	Schuyler County	Commodore Thomas McDonough	&0000000000032913.00000032,913	&0000000000000589.000000589 sq mi (&0000000000001526.0000001,526 km2)
McHenry County	111	Woodstock	1836	Cook County	Gen. William McHenry	&0000000000260077.000000260,077	&0000000000000604.000000604 sq mi (&0000000000001564.0000001,564 km2)
McLean County	113	Bloomington	1830	Tazewell County	John McLean	&0000000000150433.000000150,433	&0000000000001184.0000001,184 sq mi (&0000000000003067.0000003,067 km2)
Menard County	129	Petersburg	1839	Sangamon County	Pierre Menard	&0000000000012486.00000012,486	&0000000000000314.000000314 sq mi (&0000000000000813.000000813 km2)
Mercer County	131	Aledo	1825	Schuyler County	Hugh Mercer	&0000000000016957.00000016,957	&0000000000000561.000000561 sq mi (&0000000000001453.0000001,453 km2)
Monroe County	133	Waterloo	1816	Randolph County and St. Clair County	James Monroe	&0000000000027619.00000027,619	&0000000000000388.000000388 sq mi (&0000000000001005.0000001,005 km2)
Montgomery County	135	Hillsboro	1821	Bond and Madison County	Richard Montgomery	&0000000000030652.00000030,652	&0000000000000704.000000704 sq mi (&0000000000001823.0000001,823 km2)
Morgan County	137	Jacksonville	1823	Sangamon County	Daniel Morgan	&0000000000036616.00000036,616	&0000000000000569.000000569 sq mi (&0000000000001474.0000001,474 km2)
Moultrie County	139	Sullivan	1843	Shelby and Macon County	William Moultrie	&0000000000014287.00000014,287	&0000000000000336.000000336 sq mi (&0000000000000870.000000870 km2)
Ogle County	141	Oregon	1836	Jo Daviess	Joseph Ogle	&0000000000051032.00000051,032	&0000000000000759.000000759 sq mi (&0000000000001966.0000001,966 km2)
Peoria County	143	Peoria	1825	Fulton County	Native American Peoria	&0000000000183433.000000183,433	&0000000000000620.000000620 sq mi (&0000000000001606.0000001,606 km2)
Perry County	145	Pinckneyville	1827	Randolph and Jackson County	Oliver Hazard Perry	&0000000000023094.00000023,094	&0000000000000441.000000441 sq mi (&0000000000001142.0000001,142 km2)
Piatt County	147	Monticello	1841	De Witt and Macon County	John Piatt	&0000000000016365.00000016,365	&0000000000000440.000000440 sq mi (&0000000000001140.0000001,140 km2)
Pike County	149	Pittsfield	1821	Madison, Bond, and Clark County	Zebulon Pike	&0000000000017384.00000017,384	&0000000000000830.000000830 sq mi (&0000000000002150.0000002,150 km2)
Pope County	151	Golconda	1816	Gallatin and Johnson County	Nathaniel Pope	&0000000000004413.0000004,413	&0000000000000371.000000371 sq mi (&0000000000000961.000000961 km2)
Pulaski County	153	Mound City	1843	Alexander and Johnson County	Kazimierz Pulaski	&0000000000007348.0000007,348	&0000000000000201.000000201 sq mi (&0000000000000521.000000521 km2)
Putnam County	155	Hennepin	1825	Peoria County	Israel Putnam	&0000000000006086.0000006,086	&0000000000000160.000000160 sq mi (&0000000000000414.000000414 km2)
Randolph County	157	Chester	1795	St. Clair County	Edmund Randolph	&0000000000033893.00000033,893	&0000000000000578.000000578 sq mi (&0000000000001497.0000001,497 km2)
Richland County	159	Olney	1841	Clay and Lawrence County	Richland County, Ohio	&0000000000016149.00000016,149	&0000000000000360.000000360 sq mi (&0000000000000932.000000932 km2)
Rock Island County	161	Rock Island	1831	Jo Daviess County	Rock Island	&0000000000149374.000000149,374	&0000000000000427.000000427 sq mi (&0000000000001106.0000001,106 km2)
Saline County	165	Harrisburg	1847	Gallatin County	Salt springs within the county	&0000000000026733.00000026,733	&0000000000000383.000000383 sq mi (&0000000000000992.000000992 km2)
Sangamon County	167	Springfield	1821	Madison and Bond County	Sangamon River	&0000000000188951.000000188,951	&0000000000000868.000000868 sq mi (&0000000000002248.0000002,248 km2)
Schuyler County	169	Rushville	1825	Pike and Fulton County	Philip Schuyler	&0000000000007189.0000007,189	&0000000000000437.000000437 sq mi (&0000000000001132.0000001,132 km2)
Scott County	171	Winchester	1839	Morgan County	Scott family	&0000000000005537.0000005,537	&0000000000000251.000000251 sq mi (&0000000000000650.000000650 km2)
Shelby County	173	Shelbyville	1827	Fayette County	Isaac Shelby	&0000000000022893.00000022,893	&0000000000000759.000000759 sq mi (&0000000000001966.0000001,966 km2)
St. Clair County	163	Belleville	1790	original two counties	Arthur St. Clair	&0000000000256082.000000256,082	&0000000000000664.000000664 sq mi (&0000000000001720.0000001,720 km2)
Stark County	175	Toulon	1839	Knox and Putnam County	John Stark	&0000000000006332.0000006,332	&0000000000000288.000000288 sq mi (&0000000000000746.000000746 km2)
Stephenson County	177	Freeport	1837	Jo Daviess and Winnebago County	Benjamin Stephenson	&0000000000048979.00000048,979	&0000000000000564.000000564 sq mi (&0000000000001461.0000001,461 km2)
Tazewell County	179	Pekin	1827	Sangamon County	Littleton Waller Tazewell	&0000000000128485.000000128,485	&0000000000000649.000000649 sq mi (&0000000000001681.0000001,681 km2)
Union County	181	Jonesboro	1818	Johnson County	federal union	&0000000000018293.00000018,293	&0000000000000416.000000416 sq mi (&0000000000001077.0000001,077 km2)
Vermilion County	183	Danville	1826	Clark and Edgar County	Vermilion River	&0000000000083919.00000083,919	&0000000000000899.000000899 sq mi (&0000000000002328.0000002,328 km2)
Wabash County	185	Mount Carmel	1824	Edwards County	Wabash River	&0000000000012937.00000012,937	&0000000000000224.000000224 sq mi (&0000000000000580.000000580 km2)
Warren County	187	Monmouth	1825	Schuyler County	Joseph Warren	&0000000000018735.00000018,735	&0000000000000543.000000543 sq mi (&0000000000001406.0000001,406 km2)
Washington County	189	Nashville	1818	St. Clair County	George Washington	&0000000000015148.00000015,148	&0000000000000563.000000563 sq mi (&0000000000001458.0000001,458 km2)
Wayne County	191	Fairfield	1819	Edwards County	Gen. "Mad" Anthony Wayne	&0000000000017151.00000017,151	&0000000000000714.000000714 sq mi (&0000000000001849.0000001,849 km2)
White County	193	Carmi	1815	Gallatin County	Isaac White	&0000000000015371.00000015,371	&0000000000000495.000000495 sq mi (&0000000000001282.0000001,282 km2)
Whiteside County	195	Morrison	1836	Jo Daviess and Henry County	Samuel Whiteside	&0000000000060653.00000060,653	&0000000000000685.000000685 sq mi (&0000000000001774.0000001,774 km2)
Will County	197	Joliet	1836	Cook and Iroquois County	Conrad Will	&0000000000502266.000000502,266	&0000000000000837.000000837 sq mi (&0000000000002168.0000002,168 km2)
Williamson County	199	Marion	1839	Franklin County	Hugh Williamson	&0000000000061296.00000061,296	&0000000000000424.000000424 sq mi (&0000000000001098.0000001,098 km2)
Winnebago County	201	Rockford	1836	Jo Daviess	Winnebago Native Americans	&0000000000278418.000000278,418	&0000000000000514.000000514 sq mi (&0000000000001331.0000001,331 km2)
Woodford County	203	Eureka	1841	Tazewell and McLean County	William Woodford	&0000000000035469.00000035,469	&0000000000000528.000000528 sq mi (&0000000000001368.0000001,368 km2)

[edit] Defunct counties

• Dane County was renamed in 1840 to the current Christian County.
• The original Knox County, Illinois, became extinct with the formation of the Illinois Territory in 1809 - or, more precisely, it became Knox County, Indiana. The modern Knox County, Illinois was formed much later and was not a part of the original Knox County.

[edit] See also

• List of Illinois county name etymologies
• List of cities in Illinois
• List of precincts in Illinois
• List of towns and villages in Illinois
• List of townships in Illinois

[edit] References

[edit] External links

Wikimedia Commons has media related to: Counties in Illinois

• Census 2000 Gazetteer
• Illinois Association of County Board Members and Commissioners
• Illinois City/County Management Association
• National Association of Counties

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