Ranking of Illinois Counties By Population with Other Groups Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 4.48M people in Illinois with Other Groups ancestry. Among all Illinois counties, Cook County had the highest population with Other Groups ancestry (2.58M), followed by DuPage County (272.24K), and Lake County (248.79K).
The chart and table below shows the top 10 counties with high number of people with Other Groups ancestry.
You can see similar information for other states and for other ancestry groups in Illinois.
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Related Topics: Illinois ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of Illinois Counties By Population with Other Groups Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Cook County | 2584260 |
| 2 | DuPage County | 272236 |
| 3 | Lake County | 248788 |
| 4 | Will County | 215016 |
| 5 | Kane County | 182089 |
| 6 | St. Clair County | 89818 |
| 7 | Winnebago County | 84348 |
| 8 | Champaign County | 61713 |
| 9 | McHenry County | 59136 |
| 10 | Madison County | 55608 |
| 11 | Peoria County | 49910 |
| 12 | Sangamon County | 48997 |
| 13 | McLean County | 35849 |
| 14 | Rock Island County | 35685 |
| 15 | Kendall County | 32496 |
| 16 | Macon County | 27440 |
| 17 | Kankakee County | 22714 |
| 18 | DeKalb County | 21966 |
| 19 | LaSalle County | 19873 |
| 20 | Vermilion County | 19111 |
| 21 | Tazewell County | 14987 |
| 22 | Boone County | 14245 |
| 23 | Jackson County | 12479 |
| 24 | Williamson County | 11921 |
| 25 | Whiteside County | 9622 |
| 26 | Knox County | 9520 |
| 27 | Ogle County | 9211 |
| 28 | Grundy County | 8662 |
| 29 | Adams County | 8057 |
| 30 | Jefferson County | 7480 |
| 31 | Stephenson County | 7186 |
| 32 | Morgan County | 7083 |
| 33 | Henry County | 7073 |
| 34 | Coles County | 6693 |
| 35 | Marion County | 6300 |
| 36 | Logan County | 6256 |
| 37 | Randolph County | 6233 |
| 38 | Lee County | 5572 |
| 39 | Franklin County | 5482 |
| 40 | Clinton County | 5290 |
| 41 | Bureau County | 5274 |
| 42 | Fulton County | 4977 |
| 43 | Livingston County | 4811 |
| 44 | Perry County | 4394 |
| 45 | Effingham County | 4309 |
| 46 | Saline County | 4297 |
| 47 | Macoupin County | 4210 |
| 48 | Iroquois County | 4100 |
| 49 | Christian County | 4008 |
| 50 | Monroe County | 3978 |
| 51 | McDonough County | 3957 |
| 52 | Cass County | 3718 |
| 53 | Crawford County | 3538 |
| 54 | Lawrence County | 3469 |
| 55 | Montgomery County | 3376 |
| 56 | Woodford County | 3131 |
| 57 | Fayette County | 3034 |
| 58 | Massac County | 3028 |
| 59 | Warren County | 2968 |
| 60 | Bond County | 2758 |
| 61 | Douglas County | 2668 |
| 62 | Union County | 2482 |
| 63 | Johnson County | 2467 |
| 64 | Richland County | 2382 |
| 65 | Wayne County | 2343 |
| 66 | Jersey County | 2195 |
| 67 | Edgar County | 2153 |
| 68 | Pulaski County | 2127 |
| 69 | Jo Daviess County | 2123 |
| 70 | Wabash County | 2092 |
| 71 | Clark County | 2014 |
| 72 | Piatt County | 1995 |
| 73 | Shelby County | 1855 |
| 74 | Hancock County | 1849 |
| 75 | Ford County | 1843 |
| 76 | Alexander County | 1810 |
| 77 | Brown County | 1793 |
| 78 | Pike County | 1787 |
| 79 | De Witt County | 1748 |
| 80 | Carroll County | 1691 |
| 81 | Mercer County | 1670 |
| 82 | Clay County | 1628 |
| 83 | White County | 1463 |
| 84 | Mason County | 1426 |
| 85 | Menard County | 1415 |
| 86 | Greene County | 1383 |
| 87 | Moultrie County | 1361 |
| 88 | Marshall County | 1300 |
| 89 | Washington County | 1191 |
| 90 | Cumberland County | 1100 |
| 91 | Hamilton County | 1030 |
| 92 | Gallatin County | 849 |
| 93 | Schuyler County | 823 |
| 94 | Stark County | 733 |
| 95 | Jasper County | 710 |
| 96 | Putnam County | 709 |
| 97 | Edwards County | 685 |
| 98 | Pope County | 618 |
| 99 | Hardin County | 554 |
| 100 | Henderson County | 468 |
| 101 | Scott County | 430 |
| 102 | Calhoun County | 331 |
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