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Illinois: county data, all 102 of them.

Every Illinois county has a data page built from federal sources, each figure carrying its publisher and period. What this page does not carry is the Illinois statutory framework, and the reason is below rather than hidden.

Counties
102
Population
12,694,798
Land area
55,518 sq mi
Establishments
321,239
Combined county GDP
$1148.11 bn
SBA approvals recorded
19,244

Read this first

This is a county directory, not a state guide.

The county pages below are complete. They carry demographics, growth and migration, economic output, employment and wages, business establishments by industry, the construction pipeline, the SBA lending record including charge off rates, geography and hazard. Every figure names its publisher and the period it describes.

What is missing is the Illinois legal and regulatory frame: how zoning and land development codes work in this state, what the entitlement path looks like, which agencies permit what, and which statutes override local codes. That material requires a research pack for Illinois, and no such pack exists yet.

Why there is no state guide here

You cannot write Illinois zoning law from a population table. Everything on the county pages is derived from federal datasets that cover all counties equally; statutory analysis is not, and generating it anyway would produce confident text about the law that nothing behind it supports.

Florida and California have research packs and therefore have full state guides. The remaining eight, including this one, do not. That is stated rather than papered over.

Counties

All 102 Illinois county-equivalents.

Illinois counties: population, income, establishments and SBA activity
GeographyPopulationMedian incomeEstablishmentsCounty GDPSBA approvalsLand area, sq mi
Adams County64,754$66,2201,787$4.66 bn45855
Alexander County4,875$47,04375$273.5 mNone recorded236
Bond County16,716$65,959303$781.2 m8380
Boone County53,230$84,571890$1.97 bn45281
Brown County6,322$67,917108$624.0 m4306
Bureau County32,866$69,257699$1.60 bn12869
Calhoun County4,330$93,20377$131.1 m2254
Carroll County15,576$60,758363$761.5 m10445
Cass County12,784$68,125241$883.5 m1376
Champaign County208,741$63,6834,237$15.45 bn216996
Christian County33,538$62,611709$1.97 bn31709
Clark County15,266$72,927335$715.5 m2501
Clay County13,052$60,417322$699.4 m2468
Clinton County36,954$86,588913$1.58 bn29474
Coles County46,777$56,4781,112$3.51 bn22508
Cook County5,182,090$83,498134,513$546.44 bn8,581945
Crawford County18,511$71,674411$1.66 bn5444
Cumberland County10,334$73,327178$1.83 bn3346
De Witt County15,373$71,678343$1.63 bn7398
DeKalb County100,703$70,7241,975$5.66 bn138631
Douglas County19,751$77,320575$1.44 bn11417
DuPage County930,024$112,09634,121$129.73 bn2,344327
Edgar County16,535$59,941334$1.04 bn14623
Edwards County6,075$60,519132$320.6 mNone recorded222
Effingham County34,522$80,4041,263$3.08 bn34479
Fayette County21,315$60,944477$770.4 m9716
Ford County13,406$62,439343$1.12 bnNone recorded486
Franklin County37,323$56,740696$1.36 bn22409
Fulton County33,020$60,599596$1.14 bn6866
Gallatin County4,819$59,21982$172.5 m4323
Greene County11,683$62,192215$430.9 m7543
Grundy County53,219$92,2351,202$6.04 bn80418
Hamilton County7,916$65,746175$478.3 m6435
Hancock County17,281$65,865365$824.4 m11794
Hardin County3,605$54,27155$125.5 m2178
Henderson County6,193$62,227105$224.5 mNone recorded379
Henry County48,643$71,9111,037$2.05 bn39823
Iroquois County26,449$66,255625$1.42 bn31,117
Jackson County53,064$48,7631,196$3.30 bn33584
Jasper County9,180$74,755226$645.6 m5495
Jefferson County36,550$63,118882$2.43 bn72571
Jersey County21,274$80,361404$672.9 m18369
Jo Daviess County21,851$73,993673$1.14 bn14601
Johnson County13,376$62,528175$328.9 m4344
Kane County517,255$103,16313,537$37.06 bn1,158520
Kankakee County106,635$71,2812,268$8.53 bn80677
Kendall County137,675$111,6012,548$5.41 bn217320
Knox County49,046$57,030968$2.45 bn28716
Lake County714,223$110,41620,076$82.87 bn1,284444
LaSalle County108,714$73,0452,523$7.67 bn781,135
Lawrence County15,031$55,324247$661.2 m4372
Lee County33,869$70,292690$2.17 bn26725
Livingston County35,565$73,790826$2.89 bn111,044
Logan County27,713$66,358536$1.34 bn15618
Macon County101,849$62,6662,241$9.05 bn138581
Macoupin County44,350$70,805813$1.53 bn39863
Madison County264,238$75,7935,659$16.58 bn302716
Marion County37,000$61,240863$1.76 bn23572
Marshall County11,647$71,585235$686.6 m5387
Mason County12,745$62,845255$633.8 m1539
Massac County13,865$65,116217$508.9 m4237
McDonough County26,920$52,795611$1.46 bn12589
McHenry County312,591$104,8028,140$15.98 bn661603
McLean County171,556$79,9053,481$16.91 bn1841,183
Menard County12,095$82,176207$364.2 m12314
Mercer County15,495$74,182258$589.6 m5561
Monroe County35,036$102,880875$1.35 bn65385
Montgomery County27,942$63,620676$2.02 bn24704
Morgan County33,021$66,306759$2.06 bn40569
Moultrie County14,424$71,784336$981.0 m19336
Ogle County51,495$82,1321,053$3.85 bn37759
Peoria County179,645$65,1084,168$16.97 bn151619
Perry County20,639$62,118378$873.3 m7442
Piatt County16,695$94,811339$719.1 m7439
Pike County14,469$59,777349$824.6 m3831
Pope County3,739$60,05049$85.1 m2369
Pulaski County5,015$42,46386$222.7 m5199
Putnam County5,601$75,590133$427.9 m1160
Randolph County30,058$68,131636$2.02 bn12576
Richland County15,598$62,455423$834.2 m2360
Rock Island County142,757$67,1592,992$12.61 bn93428
Saline County23,213$53,117538$1.12 bn22380
Sangamon County194,947$75,3574,925$15.67 bn343868
Schuyler County6,787$65,948161$346.0 m5437
Scott County4,937$66,70584$207.8 m3251
Shelby County20,720$72,095422$1.10 bn9759
St. Clair County253,694$73,8544,973$16.13 bn260658
Stark County5,308$62,878116$340.0 m1288
Stephenson County43,768$64,0431,003$2.49 bn36565
Tazewell County130,290$77,9822,772$7.84 bn108649
Union County16,997$55,728352$532.8 m4413
Vermilion County72,386$56,8771,300$4.18 bn68898
Wabash County11,119$57,086249$451.0 mNone recorded223
Warren County16,447$67,385351$1.10 bn1542
Washington County13,627$78,224364$1.26 bn6563
Wayne County15,973$55,521374$679.4 m3714
White County13,619$54,813340$724.4 m12495
Whiteside County54,947$67,5001,158$2.98 bn29684
Will County701,462$109,98417,085$50.33 bn1,213837
Williamson County66,876$65,6041,597$3.99 bn59420
Winnebago County283,292$65,8376,286$18.80 bn389513
Woodford County38,312$91,483793$1.78 bn17528

The register

Every source behind these 102 pages.

SourcePeriod coveredLicence
US Census Bureau, American Community Survey 5-Year Estimates2020-2024 5-yearUS Census Bureau, public domain
US Census Bureau, Population Estimates Program, Vintage 2024Vintage 2024, estimates 2020 to 2024US Census Bureau, public domain
US Bureau of Economic Analysis, Regional, table CAGDP2CAGDP2, through 2024US Bureau of Economic Analysis, public domain
US EPA, Map of Radon Zones, county spreadsheet2024-05 publication, EPA 402/A-16/001US EPA, public domain
FEMA OpenFEMA, NFIP Community Status BookCommunity Status Book, as retrievedFEMA OpenFEMA, public domain
US Small Business Administration, 7(a) FOIA releaseFY2020 to FY2026 year to date, as of 2026-06-30FOIA release, public domain
US Small Business Administration, 504 FOIA releaseFY2010 to FY2026 year to date, as of 2026-06-30FOIA release, public domain
US Census Bureau county boundary geometry, TIGER, adjacency computed from shared boundary verticesTIGER county boundariesUS Census Bureau, public domain
US Census Bureau, County Business Patterns2023US Census Bureau, public domain
US Bureau of Labor Statistics, Quarterly Census of Employment and Wages2024 annual averagesUS BLS, public domain
US Census Bureau, Building Permits Survey2024 annualUS Census Bureau, public domain
US Internal Revenue Service, Statistics of Income county migration flows2021 to 2022 filing yearsIRS SOI, public domain

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