What is the current population of O'Fallon?

Based on the latest 2020 data from the US census, the current population of O'Fallon is 29,583. O'Fallon, Illinois is the 1,299th largest city in the US.

What was the peak population of O'Fallon?

The current population of O'Fallon (29,583) is it's peak population.

How quickly is O'Fallon growing?

O'Fallon has grown 32.8% since the 2000. O'Fallon, Illinois is growing moderately quickly; it is growing faster than 75% of similarly sized cities since 2000.

Population History

Year Population Rank in US
2019 29,583 1,299
2018 29,584 1,292
2017 29,272 1,294
2016 29,031 1,287
2015 29,002 1,288
2014 29,069 1,276
2013 29,143 1,266
2012 29,193 1,247
2011 29,251 1,238
2010 28,281 1,265
2009 27,778 1,261
2008 27,515 1,263
2007 27,044 1,275
2006 26,265 1,299
2005 25,656 1,314
2004 24,948 1,336
2003 24,323 1,361
2002 23,286 1,394
2001 22,746 1,415
2000 22,272 1,429
1990 16,550 1,630

Similarly Sized Cities In US

US Rank Name Population Growth
2000-2019
1289 Santa Paula, California 29,806 3.6%
1290 Eagle, Idaho 29,796 139.3%
1291 Maryville, Tennessee 29,742 28.3%
1292 Walnut, California 29,685 -1.2%
1293 Eagle Pass, Texas 29,684 30.2%
1294 Suisun City, California 29,663 12.8%
1295 Texarkana, Arkansas 29,657 6.4%
1296 Kent, Ohio 29,646 5.2%
1297 North Chicago, Illinois 29,615 -17.6%
1298 Duluth, Georgia 29,609 28.5%
1299 O'Fallon, Illinois 29,583 32.8%
1300 Atwater, California 29,559 27.0%
1301 Highland Park, Illinois 29,515 -2.6%
1302 Westfield, New Jersey 29,512 -0.5%
1303 Oak Park, Michigan 29,431 -9.1%
1304 Rexburg, Idaho 29,400 65.2%
1305 Central, Louisiana 29,357 10.1%
1306 Chicago Heights, Illinois 29,322 -10.5%
1307 East Palo Alto, California 29,314 -2.1%
1308 Parkersburg, West Virginia 29,306 -12.0%
1309 Russellville, Arkansas 29,175 21.5%

Similarly Sized Cities In Illinois

US Rank Name Population Growth
2000-2019
648 Des Plaines 58,899 3.1%
668 Orland Park 57,857 12.5%
687 Tinley Park 55,773 13.2%
702 Oak Lawn 55,022 -0.3%
713 Normal 54,469 19.3%
715 Berwyn 54,391 0.7%
726 Mount Prospect 53,719 -4.4%
743 Wheaton 52,745 -5.0%
749 Oak Park 52,381 -0.2%
768 Hoffman Estates 50,932 2.4%
797 Downers Grove 49,057 -1.2%
832 Glenview 47,308 9.5%
838 Elmhurst 46,746 8.4%
870 Plainfield 44,308 222.3%
871 Lombard 44,303 3.8%
904 DeKalb 42,847 9.3%
916 Urbana 42,214 11.5%
938 Moline 41,356 -5.9%
950 Belleville 40,897 -3.4%
956 Bartlett 40,647 10.3%
961 Buffalo Grove 40,494 -6.4%
974 Quincy 39,949 -1.8%
978 Crystal Lake 39,829 3.8%
981 Romeoville 39,746 79.9%
993 Streamwood 39,228 7.1%
996 Carol Stream 39,203 -3.1%
1010 Wheeling 38,646 6.5%
1034 Hanover Park 37,426 -2.2%
1038 Carpentersville 37,254 19.6%
1042 Rock Island 37,176 -6.2%
1050 Park Ridge 36,950 -2.2%
1061 Addison 36,482 0.1%
1075 Oswego 36,252 160.8%
1087 Calumet City 35,913 -7.9%
1159 Glendale Heights 33,617 5.0%
1167 Woodridge 33,432 7.3%
1180 Northbrook 32,958 -1.7%
1185 St. Charles 32,887 16.4%
1196 Elk Grove Village 32,400 -6.7%
1213 Pekin 32,045 -5.4%
1238 Mundelein 31,051 -0.2%
1245 Algonquin 30,897 32.8%
1261 Danville 30,479 -11.3%
1264 Gurnee 30,378 4.9%
1274 Galesburg 30,197 -10.4%
1297 North Chicago 29,615 -17.6%
1299 O'Fallon 29,583 32.8%
1301 Highland Park 29,515 -2.6%
1306 Chicago Heights 29,322 -10.5%
1323 Niles 28,938 -3.6%
1331 Lake in the Hills 28,634 18.9%
1342 Burbank 28,289 1.3%
1355 Granite City 28,158 -11.7%
1373 Glen Ellyn 27,714 1.7%
1383 Lansing 27,402 -3.2%
1392 Huntley 27,228 337.8%
1396 Oak Forest 27,173 -3.6%
1401 Round Lake Beach 27,100 3.6%
1403 Wilmette 27,089 -1.8%
1406 McHenry 27,061 24.0%
1420 New Lenox 26,926 46.5%
1424 West Chicago 26,816 12.2%
1440 Vernon Hills 26,521 30.1%
1444 Batavia 26,420 8.2%
1457 Alton 26,208 -13.9%
1463 East St. Louis 26,047 -17.4%
1465 Kankakee 26,024 -5.8%
1486 Lockport 25,615 63.0%
1506 Woodstock 25,240 24.2%
1508 Edwardsville 25,233 12.7%
1514 Belvidere 25,143 18.5%
1519 Carbondale 25,083 -4.4%
1539 South Elgin 24,755 49.7%
1542 Melrose Park 24,703 6.6%
1561 Homer Glen 24,472 9.0%
1564 Westmont 24,443 -1.8%
1568 Harvey 24,408 -18.5%
1571 Collinsville 24,395 -2.2%
1587 Elmwood Park 24,098 -5.0%
1606 Freeport 23,775 -9.9%
1625 Rolling Meadows 23,532 -4.5%
1627 Zion 23,487 2.1%
1636 Loves Park 23,371 14.9%
1637 Lisle 23,270 2.9%
1639 Maywood 23,158 -14.0%
1649 Blue Island 22,899 -2.3%
1658 Morton Grove 22,796 1.6%
1666 Machesney Park 22,677 9.0%
1673 East Peoria 22,546 -0.5%
1681 Roselle 22,463 -3.6%
1685 Dolton 22,348 -12.6%
1713 Geneva 21,809 10.2%
1715 Bloomingdale 21,779 0.0%
1726 Darien 21,628 -5.8%
1734 Villa Park 21,483 -3.7%
1748 South Holland 21,296 -4.2%
1758 Park Forest 21,210 -9.8%
1785 Grayslake 20,725 10.6%
1791 East Moline 20,645 -3.8%
1792 Yorkville 20,613 212.9%
1811 Crest Hill 20,376 49.3%
1823 Libertyville 20,205 -2.9%
1826 Mokena 20,159 36.7%
1834 Charleston 20,117 -4.9%
1862 Lake Zurich 19,877 7.1%
1875 Montgomery 19,638 250.4%
1887 Bourbonnais 19,462 26.7%
1889 Matteson 19,448 49.1%
1890 Lake Forest 19,446 -3.6%
1893 Frankfort 19,373 81.1%
1909 Evergreen Park 19,147 -7.9%
1935 Alsip 18,709 -5.0%
1938 Homewood 18,703 -4.2%
1942 Bellwood 18,672 -8.9%
1945 Deerfield 18,646 0.6%
1951 Jacksonville 18,603 -6.9%
1968 Sycamore 18,322 47.4%
1969 Brookfield 18,310 -3.9%
1987 Round Lake 18,100 200.2%
1989 Cary 18,067 15.8%
1990 Ottawa 18,063 -2.6%
1991 North Aurora 18,057 64.7%
1992 Bensenville 18,044 -12.9%
2031 Hinsdale 17,637 1.0%
2033 Franklin Park 17,627 -9.4%
2034 Mattoon 17,615 -3.3%
2044 Marion 17,520 8.0%
2048 Shorewood 17,509 116.0%
2058 Macomb 17,413 -5.6%
2060 Godfrey 17,400 3.5%
2067 Lemont 17,291 27.8%
2092 Palos Hills 17,060 -3.4%
2141 Washington 16,516 40.7%
2144 Country Club Hills 16,482 1.8%
2162 Fairview Heights 16,303 8.7%
2164 Morton 16,277 5.2%
2184 Westchester 16,117 -4.1%
2188 Bridgeview 16,096 4.9%
2215 Prospect Heights 15,887 -6.7%
2267 La Grange 15,322 -1.7%
2268 Bradley 15,314 17.6%
2284 Dixon 15,115 -5.5%
2291 Morris 15,053 25.1%

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