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Illinois Population News Articles

Population Density

Historic & Projected Growth

Population by County


POPULATION DENSITY

People per square mile, 2010:   231.1

People per square mile, 2020:  230.8


HISTORIC & PROJECTED GROWTH 1790 TO 2040

Year
Population
1790
0
1800
0
1810
12,282
1820
55,211
1830
157,445
1840
476,173
1850
851,470
1860
1,711,951
1870
2,539,891
1880
3,077,871
1890
3,826,352
1900
4,821,550
1910
5,638,591
1920
6,485,280
1930
7,630,654
1940
7,897,241
1950
8,712,176
1960
10,081,158
1970
11,110,285
1980
11,427,409
1990
11,430,602
2000
12,419,293
2010
12,830,632
2020
12,812,508
2030
12,709,901
2040
12,397,564

SOURCE: U.S. Bureau of the Census & Weldon Cooper Center, Demographics Research Group
(The Census Bureau and Weldon Cooper Center have not yet provided updated State projections to reflect 2020 census numbers.)


Population by County

County
Census 2020 Population
Census 2010 Population
Change from 2010
Percent Change
ILLINOIS
12,812,508
12,830,632
-18,124
-0.14%
Adams County
65,737
67,103
-1,366
-2.04%
Alexander County
5,240
8,238
-2,998
-36.39%
Bond County
16,725
17,768
-1,043
-5.87%
Boone County
53,448
54,165
-717
-1.32%
Brown County
6,244
6,937
-693
-9.99%
Bureau County
33,244
34,978
-1,734
-4.96%
Calhoun County
4,437
5,089
-652
-12.81%
Carroll County
15,702
15,387
315
2.05%
Cass County
13,042
13,642
-600
-4.40%
Champaign County
205,865
201,081
4,784
2.38%
Christian County
34,032
34,800
-768
-2.21%
Clark County
15,455
16,335
-880
-5.39%
Clay County
13,288
13,815
-527
-3.81%
Clinton County
36,899
37,762
-863
-2.29%
Coles County
46,863
53,873
-7,010
-13.01%
Cook County
5,275,541
5,194,675
80,866
1.56%
Crawford County
18,679
19,817
-1,138
-5.74%
Cumberland County
10,450
11,048
-598
-5.41%
DeKalb County
100,420
105,160
-4,740
-4.51%
De Witt County
15,516
16,561
-1,045
-6.31%
Douglas County
19,740
19,980
-240
-1.20%
DuPage County
932,877
916,924
15,953
1.74%
Edgar County
16,866
18,576
-1,710
-9.21%
Edwards County
6,245
6,721
-476
-7.08%
Effingham County
34,668
34,242
426
1.24%
Fayette County
21,488
22,140
-652
-2.94%
Ford County
13,534
14,081
-547
-3.88%
Franklin County
37,804
39,561
-1,757
-4.44%
Fulton County
33,609
37,069
-3,460
-9.33%
Gallatin County
4,946
5,589
-643
-11.50%
Greene County
11,985
13,886
-1,901
-13.69%
Grundy County
52,533
50,063
2,470
4.93%
Hamilton County
7,993
8,457
-464
-5.49%
Hancock County
17,620
19,104
-1,484
-7.77%
Hardin County
3,649
4,320
-671
-15.53%
Henderson County
6,387
7,331
-944
-12.88%
Henry County
49,284
50,486
-1,202
-2.38%
Iroquois County
27,077
29,718
-2,641
-8.89%
Jackson County
52,974
60,218
-7,244
-12.03%
Jasper County
9,287
9,698
-411
-4.24%
Jefferson County
37,113
38,827
-1,714
-4.41%
Jersey County
21,512
22,985
-1,473
-6.41%
Jo Daviess County
22,035
22,678
-643
-2.84%
Johnson County
13,308
12,582
726
5.77%
Kane County
516,522
515,269
1,253
0.24%
Kankakee County
107,502
113,449
-5,947
-5.24%
Kendall County
131,869
114,736
17,133
14.93%
Knox County
49,967
52,919
-2,952
-5.58%
Lake County
714,342
703,462
10,880
1.55%
La Salle County
109,658
113,924
-4,266
-3.74%
Lawrence County
15,280
16,833
-1,553
-9.23%
Lee County
34,145
36,031
-1,886
-5.23%
Livingston County
35,815
38,950
-3,135
-8.05%
Logan County
27,987
30,305
-2,318
-7.65%
McDonough County
27,238
32,612
-5,374
-16.48%
McHenry County
310,229
308,760
1,469
0.48%
McLean County
170,954
169,572
1,382
0.81%
Macon County
103,998
110,768
-6,770
-6.11%
Macoupin County
44,967
47,765
-2,798
-5.86%
Madison County
265,859
269,282
-3,423
-1.27%
Marion County
37,729
39,437
-1,708
-4.33%
Marshall County
11,742
12,640
-898
-7.10%
Mason County
13,086
14,666
-1,580
-10.77%
Massac County
14,169
15,429
-1,260
-8.17%
Menard County
12,297
12,705
-408
-3.21%
Mercer County
15,699
16,434
-735
-4.47%
Monroe County
34,962
32,957
2,005
6.08%
Montgomery County
28,288
30,104
-1,816
-6.03%
Morgan County
32,915
35,547
-2,632
-7.40%
Moultrie County
14,526
14,846
-320
-2.16%
Ogle County
51,788
53,497
-1,709
-3.19%
Peoria County
181,830
186,494
-4,664
-2.50%
Perry County
20,945
22,350
-1,405
-6.29%
Piatt County
16,673
16,729
-56
-0.33%
Pike County
14,739
16,430
-1,691
-10.29%
Pope County
3,763
4,470
-707
-15.82%
Pulaski County
5,193
6,161
-968
-15.71%
Putnam County
5,637
6,006
-369
-6.14%
Randolph County
30,163
33,476
-3,313
-9.90%
Richland County
15,813
16,233
-420
-2.59%
Rock Island County
144,672
147,546
-2,874
-1.95%
St. Clair County
257,400
270,056
-12,656
-4.69%
Saline County
23,768
24,913
-1,145
-4.60%
Sangamon County
196,343
197,465
-1,122
-0.57%
Schuyler County
6,902
7,544
-642
-8.51%
Scott County
4,949
5,355
-406
-7.58%
Shelby County
20,990
22,363
-1,373
-6.14%
Stark County
5,400
5,994
-594
-9.91%
Stephenson County
44,630
47,711
-3,081
-6.46%
Tazewell County
131,343
135,394
-4,051
-2.99%
Union County
17,244
17,808
-564
-3.17%
Vermilion County
74,188
81,625
-7,437
-9.11%
Wabash County
11,361
11,947
-586
-4.90%
Warren County
16,835
17,707
-872
-4.92%
Washington County
13,761
14,716
-955
-6.49%
Wayne County
16,179
16,760
-581
-3.47%
White County
13,877
14,665
-788
-5.37%
Whiteside County
55,691
58,498
-2,807
-4.80%
Will County
696,355
677,560
18,795
2.77%
Williamson County
67,153
66,357
796
1.20%
Winnebago County
285,350
295,266
-9,916
-3.36%
Woodford County
38,467
38,664
-197
-0.51%

SOURCE: U.S. Bureau of the Census


Illinois Population News Articles

Illinois city plans to source its future drinking water from Lake Michigan – Sept 30, 2024

IL bee population stunted by pesticides – Sept 27, 2024

Illinois to ban fluorescent lighting in 2026 – Sept 18, 2024

Chicago to close three shelters by end of October as migrant arrivals fall – Sept 12, 2024

Monarch butterfly numbers have dropped this summer in Illinois, experts say – Sept 8, 2024

Climate change to be required Illinois teaching, thanks to two Naperville students – Sept 6, 2024

11.9% of Illinois Residents Are Experiencing Drought Conditions in 2024 – Sept 4, 2024

Residents of Illinois town evacuate as officials warn of ‘imminent’ dam failure – July 16, 2024

Undocumented immigrants now eligible for standard Illinois driver’s licenses with “federal limits” – July 1, 2024

IRS: Illinois loses $10 billion in income from 87,000 people moving out – June 28th, 2024

Most new gas, diesel vehicle sales would be banned in Illinois by 2035 under proposal – June 27, 2024

Illinois is home to 2 of the Dirtiest Cities in America – June 26, 2024

Chicago-area severe weather prompts warnings from climate experts, calls to reduce water use – June 25, 2024

Goodbye, snowy Illinois winters? New climate report offers dry projections – November 20, 2023

Illinois earmarks $160 million to keep migrants warm in Chicago as winter approaches – November 17, 2023

Illinois takes major step toward lowering emissions, thanks to Ventura – November 16, 2023

The 8 Biggest Cities Located on the Shores of Lake Michigan – November 8, 2023

Report Examines Unequal Effects of Climate Change on Lake County Communities – October 26, 2023

Illinois EPA Invites 5th & 6th Grade Student Writers and Artists to Compete in Annual Poster, Poetry, and Prose Contest – October 25, 2023

Illinois has had the most tornadoes in the U.S. this year. Here’s why. – July 28, 2023

Chicago’s air quality: ‘We’re in the crosshairs.’ Wildfires and wind push region’s air to worst in the world, global pollution index shows. – June 27, 2023

State of Illinois expands air quality alert messaging statewide – Jul 25, 2023

Millions in Illinois Are Drinking Contaminated Water – June 29, 2023

Activists call for Chicago to rule out natural gas in new buildings, citing health risks, costs and climate change – January 19, 2023

Illinois making effort to reduce shoreline erosion – January 16, 2023

New State Water Plan spotlights 13 critical water-related challenges for Illinois – January 11, 2023

A 3M Plant in Illinois Was The Country’s Worst Emitter of a Climate-Killing ‘Immortal’ Chemical in 2021 – December 29, 2022

Illinois is leading in clean electricity, but it’s falling behind elsewhere, study says – July 30, 2022

From the Farm: Losing farmland – July 20, 2022

Illinois is converting coal plants to solar projects – July 14, 2022

Illinois Poised to Improve Public Health & Economy by Adopting Clean Truck Policies – July 11, 2022

8M Illinoisans get drinking water from a utility where forever chemicals have been detected, investigation finds – July 11, 2022

The Most Traveled Bridge in Illinois That Doesn’t Meet Safety Standards – March 27, 2022

Illinois AG files suit against Marathon over crude oil spill in Cahokia Creek – March 21, 2022

Farm Bureau opposes nutrient loss bill as negotiations continue – March 2, 2022

Chicago is no safe haven from climate change – March 1, 2022

Illinois — a major feeder to the Gulf of Mexico dead zone — falls behind federal goal to reduce phosphorus and nitrogen flowing into its waterways – December 20, 2021

Little Village residents slam city for failing to reduce influx of industry: ‘As if we don’t deserve clean air’ – December 16, 2021

Fall is heating up in Illinois cities – November 29, 2021

1 million EVs: Inside the state’s plan for electrifying the transportation sector – November 23, 2021

Fertilizer Runoff In Illinois Is Still On The Rise, Despite Program Designed To Slow It Down – September 24, 2021

Habitat Loss, Traffic Noise, Runoff: 143 St. Project Concerns – September 17, 2021

Illinois Passes Nation-Leading, Equitable Climate Bill – September 12, 2021

Sierra Club demands Springfield, CWLP establish an alert system for pollution incidents – September 7, 2021

As Climate Change Ramps Up Heat, Farmers Struggle To Keep Animals Cool – Aug 30, 2021

IL mosquito populations explode in wet summer after dry spring – July 13, 2021

ICC approves Ameren’s electric vehicle charging tariff – July 10, 2021

Lakefront Dump Site Opposed By Park Advocates, Southeast Siders Hasn’t Had A Valid Pollution Permit Since May 31 – June 30, 2021

As legislature reconvenes, Illinois is poised to become the first state in the Midwest to ban coal-burning power plants – June 15, 2021

This is How Much Renewable Energy Illinois is Producing – April 1, 2021

“Climate change is real;” Researchers warn extreme weather events could impact Illinois agriculture – March 31, 2021

Lax Oversight Of Coal Plant Demolitions Could Leave Illinois Communities Vulnerable – March 3, 2021

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