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People Statistics · Region

Population in Illinois

1990 – 2025 · 36 data points 6 of 51 · Regions of United States Updated Oct 21, 2026
People · Illinois United States

Source: OECD Regional Database, 1990 – 2025

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Overview 6 figures People 18 figures Economy 20 figures Housing 8 figures Education 10 figures Tourism 3 figures Climate 3 figures
Latest value · 2025 12,719,141 +0.1% since 2024
Regions of United States · 2025 6 of 51 Place 1 is the highest value.
since 2015 −1.1% +0.3% a year on average
share of United States 3.72% United States: 341,784,857 · 2025
Population, 1990 – 2025 people
−1.1% since 2015

Source: OECD Regional Database, 1990 – 2025

Compared with Population · people
Illinois 13M
United States 342M
World 8.2B

Sources: OECD Regional Database · World Bank — World Development Indicators

The series at a glance Illinois · 1990 – 2025
Latest value 12,719,141 · 2025
First value 11,453,316 · 1990
Highest 12,895,129 · 2013
Lowest 11,453,316 · 1990
Average change +0.3% a year on average
Data points 36

By year

All years · 1990 – 2025

YearIllinoisChange United StatesWorld
2025 12,719,141 +0.1% 342M 8.2B
2024 12,710,158 +0.5% 340M 8.1B
2023 12,642,259 +0.2% 337M 8.1B
2022 12,621,821 −0.6% 334M 8B
2021 12,700,641 −0.8% 332M 7.9B
2020 12,799,088 +1.0% 332M 7.9B
2019 12,671,821 −0.4% 328M 7.8B
2018 12,723,071 −0.4% 327M 7.7B
2017 12,778,828 −0.3% 325M 7.6B
2016 12,820,527 −0.3% 323M 7.5B
2015 12,858,913 −0.2% 321M 7.4B
2014 12,884,493 −0.1% 318M 7.4B
2013 12,895,129 +0.1% 316M 7.3B
2012 12,882,510 +0.1% 314M 7.2B
2011 12,867,454 +0.2% 312M 7.1B
2010 12,840,503 +0.3% 309M 7B
2009 12,796,778 +0.4% 307M 6.9B
2008 12,747,038 +0.4% 304M 6.8B
2007 12,695,866 +0.4% 301M 6.7B
2006 12,643,955 +0.3% 298M 6.7B
2005 12,609,903 +0.2% 296M 6.6B
2004 12,589,773 +0.3% 293M 6.5B
2003 12,556,006 +0.2% 290M 6.4B
2002 12,525,556 +0.3% 288M 6.3B
2001 12,488,445 +0.4% 285M 6.2B
2000 12,434,161 +0.6% 282M 6.2B
1999 12,359,020 +0.7% 279M 6.1B
1998 12,271,847 +0.7% 276M 6B
1997 12,185,715 +0.7% 273M 5.9B
1996 12,101,997 +0.8% 269M 5.8B
1995 12,008,437 +0.8% 266M 5.7B
1994 11,912,585 +0.9% 263M 5.7B
1993 11,809,579 +1.0% 260M 5.6B
1992 11,694,184 +1.1% 257M 5.5B
1991 11,568,964 +1.0% 253M 5.4B
1990 11,453,316 250M 5.3B

Sources: OECD Regional Database · World Bank — World Development Indicators, 1990 – 2025

Ranking · Regions of United States

2021 · Place 1 is the highest value.

Year: 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014
Highest first Lowest first A–Z
#TerritoryPopulation
51 Wyoming 580K
50 Vermont 647K
49 District of Columbia 669K
48 Alaska 734K
47 North Dakota 778K
46 South Dakota 896K
45 Delaware 1M
44 Rhode Island 1.1M
43 Montana 1.1M
42 Maine 1.4M
41 New Hampshire 1.4M
40 Hawaii 1.4M
39 West Virginia 1.8M
38 Idaho 1.9M
37 Nebraska 2M
36 New Mexico 2.1M
35 Kansas 2.9M
34 Mississippi 2.9M
33 Arkansas 3M
32 Nevada 3.1M
31 Iowa 3.2M
30 Utah 3.3M
29 Connecticut 3.6M
28 Oklahoma 4M
27 Oregon 4.3M
26 Kentucky 4.5M
25 Louisiana 4.6M
24 Alabama 5M
23 South Carolina 5.2M
22 Minnesota 5.7M
21 Colorado 5.8M
20 Wisconsin 5.9M
19 Missouri 6.2M
18 Maryland 6.2M
17 Indiana 6.8M
16 Tennessee 7M
15 Massachusetts 7M
14 Arizona 7.3M
13 Washington 7.7M
12 Virginia 8.7M
11 New Jersey 9.3M
10 Michigan 10M
9 North Carolina 11M
8 Georgia 11M
7 Ohio 12M
6 Illinois 13M
5 Pennsylvania 13M
4 New York 20M
3 Florida 22M
2 Texas 30M
1 California 39M

Source: OECD Regional Database, 2021

What it means

How many people live here — residents, not visitors.

How it is calculated

Official count or estimate of residents for each year: a census plus births, deaths and moves since then. Estimates are revised when a new census comes out.