Illinois Population 1900-2021

Chart and table of population level and growth rate for the state of Illinois from 1900 to 2021.
  • The population of Illinois in 2021 was 12,671,469, a 0.89% decline from 2020.
  • The population of Illinois in 2020 was 12,785,245, a 0.93% increase from 2019.
  • The population of Illinois in 2019 was 12,667,017, a 0.45% decline from 2018.
  • The population of Illinois in 2018 was 12,724,685, a 0.43% decline from 2017.
Data Source: U.S. Census Bureau - Population Estimates

MLA Citation:
State Population Ranking
State Name Population
California 39,237,836
Texas 29,527,941
Florida 21,781,128
New York 19,835,913
Pennsylvania 12,964,056
Illinois 12,671,469
Ohio 11,780,017
Georgia 10,799,566
North Carolina 10,551,162
Michigan 10,050,811
New Jersey 9,267,130
Virginia 8,642,274
Washington 7,738,692
Arizona 7,276,316
Massachusetts 6,984,723
Tennessee 6,975,218
Indiana 6,805,985
Missouri 6,168,187
Maryland 6,165,129
Wisconsin 5,895,908
Colorado 5,812,069
Minnesota 5,707,390
South Carolina 5,190,705
Alabama 5,039,877
Louisiana 4,624,047
Kentucky 4,509,394
Oregon 4,246,155
Oklahoma 3,986,639
Connecticut 3,605,597
Utah 3,337,975
Iowa 3,193,079
Nevada 3,143,991
Arkansas 3,025,891
Mississippi 2,949,965
Kansas 2,934,582
New Mexico 2,115,877
Nebraska 1,963,692
Idaho 1,900,923
West Virginia 1,782,959
Hawaii 1,441,553
New Hampshire 1,388,992
Maine 1,372,247
Montana 1,104,271
Rhode Island 1,095,610
Delaware 1,003,384
North Dakota 774,948
Alaska 732,673
Wyoming 578,803
Illinois - Historical Population Data
Year Population Growth Rate
2021 12,671,469 -0.89%
2020 12,785,245 0.93%
2019 12,667,017 -0.45%
2018 12,724,685 -0.43%
2017 12,779,893 -0.33%
2016 12,821,709 -0.29%
2015 12,859,585 -0.20%
2014 12,885,092 -0.08%
2013 12,895,778 0.10%
2012 12,883,029 0.12%
2011 12,867,783 0.21%
2010 12,840,545 0.34%
2009 12,796,778 0.39%
2008 12,747,038 0.40%
2007 12,695,866 0.41%
2006 12,643,955 0.27%
2005 12,609,903 0.16%
2004 12,589,773 0.27%
2003 12,556,006 0.24%
2002 12,525,556 0.30%
2001 12,488,445 0.44%
2000 12,434,161 2.52%
1999 12,128,370 0.49%
1998 12,069,774 0.49%
1997 12,011,509 0.49%
1996 11,953,003 0.57%
1995 11,884,935 0.68%
1994 11,804,986 0.67%
1993 11,725,984 0.78%
1992 11,635,197 0.86%
1991 11,535,973 0.78%
1990 11,446,979 0.33%
1989 11,409,782 0.17%
1988 11,390,183 -0.01%
1987 11,391,178 0.03%
1986 11,387,257 -0.11%
1985 11,399,806 -0.11%
1984 11,412,132 0.03%
1983 11,408,818 -0.13%
1982 11,423,412 -0.18%
1981 11,443,458 0.08%
1980 11,434,702 0.33%
1979 11,396,837 -0.14%
1978 11,412,561 0.23%
1977 11,386,316 0.38%
1976 11,342,853 0.45%
1975 11,291,743 0.26%
1974 11,262,145 0.10%
1973 11,251,367 -0.01%
1972 11,251,948 0.44%
1971 11,202,397 0.83%
1970 11,110,285 0.65%
1969 11,039,000 0.40%
1968 10,995,000 0.44%
1967 10,947,000 1.02%
1966 10,836,000 1.34%
1965 10,693,000 1.07%
1964 10,580,000 1.71%
1963 10,402,000 1.19%
1962 10,280,000 1.48%
1961 10,130,000 0.44%
1960 10,086,000 1.00%
1959 9,986,000 1.01%
1958 9,886,000 2.25%
1957 9,668,000 1.45%
1956 9,530,000 1.01%
1955 9,435,000 1.98%
1954 9,252,000 2.06%
1953 9,065,000 1.22%
1952 8,956,000 1.89%
1951 8,790,000 0.60%
1950 8,738,000 0.78%
1949 8,670,000 1.38%
1948 8,552,000 2.53%
1947 8,341,000 2.28%
1946 8,155,000 7.29%
1945 7,601,000 -1.53%
1944 7,719,000 -0.54%
1943 7,761,000 -3.67%
1942 8,057,000 0.78%
1941 7,995,000 1.14%
1940 7,905,000 0.19%
1939 7,890,000 0.31%
1938 7,866,000 0.11%
1937 7,857,000 0.22%
1936 7,840,000 0.55%
1935 7,797,000 0.32%
1934 7,772,000 0.05%
1933 7,768,000 0.41%
1932 7,736,000 0.64%
1931 7,687,000 0.56%
1930 7,644,000 0.50%
1929 7,606,000 0.40%
1928 7,576,000 0.76%
1927 7,519,000 1.68%
1926 7,395,000 1.22%
1925 7,306,000 1.26%
1924 7,215,000 2.08%
1923 7,068,000 1.58%
1922 6,958,000 1.46%
1921 6,858,000 2.93%
1920 6,663,000 4.24%
1919 6,392,000 1.86%
1918 6,275,000 -0.60%
1917 6,313,000 0.62%
1916 6,274,000 1.29%
1915 6,194,000 1.39%
1914 6,109,000 2.48%
1913 5,961,000 2.28%
1912 5,828,000 1.23%
1911 5,757,000 1.57%
1910 5,668,000 1.81%
1909 5,567,000 1.70%
1908 5,474,000 1.67%
1907 5,384,000 1.41%
1906 5,309,000 1.30%
1905 5,241,000 1.55%
1904 5,161,000 1.77%
1903 5,071,000 1.58%
1902 4,992,000 1.59%
1901 4,914,000 1.78%
1900 4,828,000 0.00%