Ranking of Illinois Counties By Percentage of 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 (34.92% of Illinois population). Among all Illinois counties, Cook County had the highest percentage of its population with Other Groups ancestry (49.08%), followed by Pulaski County (40.29%), and Kane County (35.11%).
The chart and table below shows the top 10 counties with high percentage of its population having 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 Percentage of Population with Other Groups Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Cook County | 49.08 |
| 2 | Pulaski County | 40.29 |
| 3 | Kane County | 35.11 |
| 4 | Lake County | 34.82 |
| 5 | St. Clair County | 34.73 |
| 6 | Alexander County | 32.98 |
| 7 | Will County | 30.88 |
| 8 | Champaign County | 29.87 |
| 9 | Winnebago County | 29.55 |
| 10 | DuPage County | 29.14 |
| 11 | Cass County | 28.47 |
| 12 | Brown County | 28.33 |
| 13 | Peoria County | 27.36 |
| 14 | Boone County | 26.58 |
| 15 | Macon County | 26.30 |
| 16 | Vermilion County | 25.50 |
| 17 | Sangamon County | 24.90 |
| 18 | Kendall County | 24.85 |
| 19 | Rock Island County | 24.66 |
| 20 | Jackson County | 23.25 |
| 21 | Lawrence County | 22.43 |
| 22 | Logan County | 22.16 |
| 23 | DeKalb County | 21.77 |
| 24 | Morgan County | 21.34 |
| 25 | Massac County | 21.20 |
| 26 | Kankakee County | 21.01 |
| 27 | McLean County | 20.91 |
| 28 | Madison County | 20.90 |
| 29 | Perry County | 20.77 |
| 30 | Randolph County | 20.35 |
| 31 | Jefferson County | 20.02 |
| 32 | McHenry County | 19.03 |
| 33 | Knox County | 18.97 |
| 34 | Crawford County | 18.79 |
| 35 | Johnson County | 18.64 |
| 36 | Wabash County | 18.33 |
| 37 | LaSalle County | 18.07 |
| 38 | Saline County | 18.00 |
| 39 | Ogle County | 17.79 |
| 40 | Williamson County | 17.72 |
| 41 | Warren County | 17.58 |
| 42 | Whiteside County | 17.20 |
| 43 | Gallatin County | 16.85 |
| 44 | Marion County | 16.68 |
| 45 | Grundy County | 16.54 |
| 46 | Bond County | 16.41 |
| 47 | Lee County | 16.21 |
| 48 | Pope County | 16.18 |
| 49 | Stephenson County | 16.03 |
| 50 | Bureau County | 15.82 |
| 51 | Richland County | 15.00 |
| 52 | Iroquois County | 14.98 |
| 53 | Hardin County | 14.97 |
| 54 | Fulton County | 14.63 |
| 55 | Wayne County | 14.42 |
| 56 | Franklin County | 14.40 |
| 57 | Union County | 14.38 |
| 58 | Henry County | 14.31 |
| 59 | Clinton County | 14.28 |
| 60 | McDonough County | 14.26 |
| 61 | Fayette County | 14.10 |
| 62 | Coles County | 14.08 |
| 63 | Ford County | 13.56 |
| 64 | Douglas County | 13.54 |
| 65 | Stark County | 13.48 |
| 66 | Livingston County | 13.40 |
| 67 | Clark County | 12.92 |
| 68 | Hamilton County | 12.84 |
| 69 | Edgar County | 12.67 |
| 70 | Putnam County | 12.58 |
| 71 | Effingham County | 12.46 |
| 72 | Adams County | 12.23 |
| 72 | Clay County | 12.23 |
| 73 | Pike County | 11.98 |
| 74 | Piatt County | 11.97 |
| 75 | Montgomery County | 11.85 |
| 76 | Schuyler County | 11.84 |
| 77 | Christian County | 11.78 |
| 78 | Menard County | 11.46 |
| 79 | Monroe County | 11.45 |
| 80 | Tazewell County | 11.36 |
| 81 | Greene County | 11.35 |
| 82 | De Witt County | 11.17 |
| 83 | Marshall County | 11.04 |
| 84 | Edwards County | 10.99 |
| 85 | Carroll County | 10.85 |
| 86 | Mason County | 10.78 |
| 87 | Mercer County | 10.58 |
| 88 | White County | 10.48 |
| 89 | Cumberland County | 10.45 |
| 90 | Hancock County | 10.42 |
| 91 | Jersey County | 10.19 |
| 92 | Jo Daviess County | 9.65 |
| 93 | Macoupin County | 9.32 |
| 94 | Moultrie County | 9.30 |
| 95 | Shelby County | 8.77 |
| 96 | Scott County | 8.74 |
| 97 | Washington County | 8.61 |
| 98 | Woodford County | 8.12 |
| 99 | Jasper County | 7.62 |
| 100 | Calhoun County | 7.30 |
| 101 | Henderson County | 7.22 |
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