Illinois state population

Population of Illinois state

Last official estimated population of Illinois was 12,859,995 (year 2015)^[1]. This was 4% of total US population. Area of Illinois is 57,913.6 mi² (=149995.5 km²), in this year population density was 222.06 p/mi². If population growth rate would be same as in period 2010-2015 (+0.05%/yr), Illinois population in 2025 would be 12,918,923*.

Historical population

Historical population of Illinois state for period 1800-2015 ^[1] , ^[2] , ^[3]:

Maps: Population, population density, population changes

Estimated population for 2015^[1]. Population density is in p./sq.mi ^[4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are apx. 2012 ^[5]. Click on flag to hide it.

Population • Density • Changes

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Annual growth rate

[1800-1810] +17.45 %/yr
[1810-1820] +16.22 %/yr
[1820-1830] +11.05 %/yr
[1830-1840] +11.7 %/yr
[1840-1850] +5.98 %/yr
[1850-1860] +7.23 %/yr
[1860-1870] +4.02 %/yr
[1870-1880] +1.94 %/yr
[1880-1890] +2.2 %/yr
[1890-1900] +2.34 %/yr
[1900-1910] +1.58 %/yr
[1910-1920] +1.41 %/yr
[1920-1930] +1.64 %/yr
[1930-1940] +0.34 %/yr
[1940-1950] +0.99 %/yr
[1950-1960] +1.47 %/yr
[1960-1970] +0.98 %/yr
[1970-1980] +0.28 %/yr
[1980-1990] +0 %/yr
[1990-2000] +0.83 %/yr
[2000-2010] +0.33 %/yr
[2010-2015] +0.05 %/yr