Latest Data (2017)
Population 72,174
Nationwide Rank 492

Quick Facts

Decatur, Illinois is the 492nd largest city in the United States as of 2017.

Decatur, Illinois is a city.

Decatur, Illinois is currently 15.5% smaller than it was in 1990, the year of its peak recorded population.

Decatur, Illinois's growth is extremely below average. 98% of similarly sized cities are growing faster since 2000.

Decatur, Illinois Border Map

Similarly Sized Cities In US

US Rank Name Population Growth
2000-2017
482 Southfield, Michigan 73,208 -6.5%
483 Albany, Georgia 73,179 -4.5%
484 Apple Valley, California 73,077 33.8%
485 Rock Hill, South Carolina 73,068 43.9%
486 Pasco, Washington 73,013 114.4%
487 Bismarck, North Dakota 72,865 30.5%
488 New Britain, Connecticut 72,710 1.6%
489 Waukesha, Wisconsin 72,489 10.3%
490 Jacksonville, North Carolina 72,447 10.1%
491 Lafayette, Indiana 72,390 17.8%
492 Decatur, Illinois 72,174 -11.8%
493 Pittsburg, California 72,141 26.1%
494 Pawtucket, Rhode Island 72,001 -1.4%
495 Flagstaff, Arizona 71,975 35.5%
496 Lauderhill, Florida 71,970 7.5%
497 Gulfport, Mississippi 71,822 0.5%
498 Redlands, California 71,554 11.8%
499 Frederick, Maryland 71,408 34.4%
500 Passaic, New Jersey 71,247 4.9%
501 Wilmington, Delaware 71,106 -2.2%
502 Kissimmee, Florida 71,104 44.6%

Similarly Sized Cities In Illinois

US Rank Name Population Growth
2000-2017
247 Springfield 114,868 2.3%
256 Peoria 112,883 -0.1%
258 Elgin 112,456 18.4%
377 Waukegan 87,729 -0.7%
379 Champaign 87,432 24.0%
409 Cicero 82,552 -3.4%
443 Bloomington 77,934 18.6%
467 Arlington Heights 75,634 -1.1%
469 Bolingbrook 75,201 32.0%
471 Evanston 74,756 0.8%
478 Schaumburg 74,184 -1.4%
492 Decatur 72,174 -11.8%
521 Palatine 68,644 3.4%
575 Skokie 63,978 0.9%
646 Orland Park 58,765 14.2%
649 Des Plaines 58,193 1.9%
665 Tinley Park 56,668 15.0%
675 Oak Lawn 56,087 1.5%
681 Berwyn 55,550 2.9%
705 Normal 54,284 18.9%
714 Mount Prospect 53,930 -4.0%
724 Wheaton 53,373 -3.9%
739 Oak Park 52,261 -0.4%
747 Hoffman Estates 51,567 3.7%
773 Downers Grove 49,540 -0.2%
813 Glenview 47,659 10.4%
830 Elmhurst 46,662 8.3%
871 Plainfield 43,926 219.5%
872 Lombard 43,745 2.5%
882 DeKalb 43,193 10.1%
906 Moline 42,231 -3.9%
908 Urbana 41,989 10.9%
916 Belleville 41,649 -1.6%
926 Buffalo Grove 41,226 -4.7%
927 Bartlett 41,149 11.7%
944 Crystal Lake 40,421 5.4%
951 Quincy 40,303 -0.9%
957 Carol Stream 39,989 -1.2%
959 Streamwood 39,978 9.1%
967 Romeoville 39,632 79.4%
1000 Wheeling 38,562 6.3%
1008 Carpentersville 38,162 22.5%
1011 Rock Island 38,110 -3.8%
1015 Hanover Park 37,982 -0.7%
1029 Park Ridge 37,494 -0.7%
1045 Addison 36,820 1.1%
1052 Calumet City 36,633 -6.1%

Demographics

Population History

Year Population Rank in US
2017 72,174 492
2016 72,706 482
2015 73,254 474
2014 74,010 457
2013 74,710 448
2012 75,407 439
2011 75,852 430
2010 76,122 419
2009 76,199 405
2008 76,276 401
2007 76,700 393
2006 76,964 385
2005 77,565 375
2004 78,168 370
2003 78,749 362
2002 79,776 354
2001 80,911 341
2000 81,912 326
1990 85,424 255