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People Statistics · Region

Population density in Illinois

1990 – 2025 · 36 data points 14 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 88.4per km² +0.1% since 2024
Regions of United States · 2025 14 of 51 Place 1 is the highest value.
since 2015 −1.1% +0.3% a year on average
vs United States +137% United States: 37.3 · 2025
Population density, 1990 – 2025 per km² · Illinois · United States · World
−1.1% since 2015
Illinois United States World

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

Compared with Population density · per km²
Illinois
88.4
United States
37.3
World
62.1 · 2023

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

The series at a glance Illinois · 1990 – 2025
Latest value 88.4 · 2025
First value 79.6 · 1990
Highest 89.6 · 2013
Lowest 79.6 · 1990
Average change +0.3% a year on average
Data points 36

By year

All years · 1990 – 2025

YearIllinoisChange United StatesWorld
2025 88.4 +0.1% 37.3 —
2024 88.3 +0.5% 37.1 —
2023 87.8 +0.2% 36.8 62.1
2022 87.7 −0.6% 36.5 61.6
2021 88.2 −0.8% 36.2 61.0
2020 88.9 +1.0% 36.2 60.4
2019 88.0 −0.4% 35.8 59.8
2018 88.4 −0.4% 35.7 59.2
2017 88.8 −0.3% 35.5 58.6
2016 89.1 −0.3% 35.2 57.9
2015 89.3 −0.2% 35.0 57.3
2014 89.5 −0.1% 34.7 56.6
2013 89.6 +0.1% 34.5 55.9
2012 89.5 +0.1% 34.2 55.2
2011 89.4 +0.2% 34.0 55.6
2010 89.2 +0.3% 33.8 54.9
2009 88.9 +0.4% 33.5 54.3
2008 88.6 +0.4% 33.2 53.6
2007 88.2 +0.4% 32.9 52.9
2006 87.8 +0.3% 32.6 52.3
2005 87.6 +0.2% 32.2 51.6
2004 87.4 +0.3% 32.0 51.0
2003 87.2 +0.2% 31.7 50.4
2002 87.0 +0.3% 31.4 49.7
2001 86.8 +0.4% 31.1 49.1
2000 86.4 +0.6% 30.8 48.4
1999 85.8 +0.7% 30.5 47.8
1998 85.2 +0.7% 30.1 47.2
1997 84.6 +0.7% 29.8 46.5
1996 84.1 +0.8% 29.4 45.8
1995 83.4 +0.8% 29.1 45.1
1994 82.8 +0.9% 28.7 44.5
1993 82.0 +1.0% 28.4 43.8
1992 81.2 +1.1% 28.0 43.5
1991 80.4 +1.0% 27.6 51.7
1990 79.6 27.2 50.8

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

Ranking · Regions of United States

2020 · 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 density
51 Alaska 0.5
50 Wyoming 2.3
49 Montana 2.9
48 North Dakota 4.4
47 South Dakota 4.5
46 New Mexico 6.7
45 Idaho 8.6
44 Nebraska 9.9
43 Nevada 11.0
42 Kansas 13.9
41 Utah 15.4
40 Oregon 17.1
39 Maine 17.1
38 Colorado 21.5
37 Iowa 22.0
36 Oklahoma 22.3
35 Arkansas 22.4
34 Mississippi 24.4
33 Arizona 24.4
32 Vermont 26.8
31 Minnesota 27.7
30 West Virginia 28.7
29 Missouri 34.5
28 Alabama 38.3
27 Louisiana 41.2
26 Wisconsin 41.9
25 Texas 43.1
24 Kentucky 43.8
23 Washington 44.8
22 New Hampshire 59.4
21 Tennessee 64.9
20 South Carolina 65.8
19 Michigan 68.5
18 Georgia 71.6
17 Indiana 73.1
16 North Carolina 82.8
15 Virginia 84.2
14 Hawaii 87.2
13 Illinois 88.9
12 California 97.8
11 Ohio 111
10 Pennsylvania 112
9 Florida 155
8 New York 164
7 Delaware 196
6 Maryland 244
5 Connecticut 285
4 Massachusetts 344
3 Rhode Island 405
2 New Jersey 483
1 District of Columbia 4,220

Source: OECD Regional Database, 2020

What it means

How crowded a place is: residents per square kilometre.

How it is calculated

Residents divided by land area in square kilometres.