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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

2014 · 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
1 District of Columbia 4,166
2 New Jersey 461
3 Rhode Island 390
4 Massachusetts 333
5 Connecticut 286
6 Maryland 235
7 Delaware 184
8 New York 161
9 Florida 142
10 Pennsylvania 110
11 Ohio 109
12 California 95.6
13 Illinois 89.5
14 Hawaii 85.0
15 Virginia 81.0
16 North Carolina 78.7
17 Indiana 71.0
18 Michigan 67.5
19 Georgia 67.1
20 South Carolina 61.8
21 Tennessee 61.3
22 New Hampshire 57.4
23 Kentucky 42.9
24 Louisiana 41.2
25 Washington 40.9
26 Wisconsin 40.9
27 Texas 39.8
28 Alabama 36.8
29 Missouri 33.9
30 West Virginia 29.7
31 Minnesota 26.4
32 Vermont 26.1
33 Mississippi 24.6
34 Arizona 22.9
35 Arkansas 22.0
36 Oklahoma 21.8
37 Iowa 21.5
38 Colorado 19.9
39 Maine 16.6
40 Oregon 15.9
41 Utah 13.8
42 Kansas 13.7
43 Nevada 9.9
44 Nebraska 9.4
45 Idaho 7.6
46 New Mexico 6.6
47 South Dakota 4.3
48 North Dakota 4.1
49 Montana 2.7
50 Wyoming 2.3
51 Alaska 0.5

Source: OECD Regional Database, 2014

What it means

How crowded a place is: residents per square kilometre.

How it is calculated

Residents divided by land area in square kilometres.