Ranking of Illinois Counties By Population with American Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 449.24K people in Illinois with American ancestry. Among all Illinois counties, Cook County had the highest population with American ancestry (117.10K), followed by Lake County (24.19K), and DuPage County (23.85K).
The chart and table below shows the top 10 counties with high number of people with American 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 American Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Cook County | 117102 |
| 2 | Lake County | 24193 |
| 3 | DuPage County | 23846 |
| 4 | Will County | 16479 |
| 5 | Kane County | 14582 |
| 6 | Madison County | 13649 |
| 7 | St. Clair County | 10516 |
| 8 | Sangamon County | 9830 |
| 9 | McHenry County | 9347 |
| 10 | Winnebago County | 8478 |
| 11 | Macon County | 8082 |
| 12 | Peoria County | 8060 |
| 13 | Tazewell County | 8020 |
| 14 | Champaign County | 7322 |
| 15 | McLean County | 7142 |
| 16 | Vermilion County | 5574 |
| 17 | Whiteside County | 4923 |
| 18 | Rock Island County | 4623 |
| 19 | Williamson County | 4583 |
| 20 | LaSalle County | 4407 |
| 21 | Adams County | 4268 |
| 22 | Kankakee County | 3754 |
| 23 | Coles County | 3672 |
| 24 | Stephenson County | 3445 |
| 25 | Franklin County | 3283 |
| 26 | Effingham County | 3266 |
| 27 | Knox County | 3142 |
| 28 | Christian County | 3100 |
| 29 | Marion County | 3062 |
| 30 | DeKalb County | 2994 |
| 31 | Kendall County | 2949 |
| 32 | Henry County | 2883 |
| 33 | Macoupin County | 2751 |
| 34 | Fayette County | 2723 |
| 34 | Ogle County | 2723 |
| 35 | McDonough County | 2618 |
| 36 | Montgomery County | 2591 |
| 37 | Morgan County | 2476 |
| 38 | Fulton County | 2454 |
| 39 | Shelby County | 2403 |
| 40 | Jefferson County | 2350 |
| 41 | Woodford County | 2314 |
| 42 | Carroll County | 2242 |
| 43 | Hancock County | 2227 |
| 44 | Jackson County | 2195 |
| 45 | Clinton County | 2166 |
| 46 | Saline County | 2110 |
| 47 | Livingston County | 2073 |
| 48 | Jo Daviess County | 2064 |
| 49 | Monroe County | 2035 |
| 50 | Jersey County | 2030 |
| 51 | Randolph County | 1958 |
| 52 | Lee County | 1901 |
| 53 | Pike County | 1855 |
| 54 | Clay County | 1750 |
| 55 | Logan County | 1719 |
| 56 | Crawford County | 1696 |
| 57 | Douglas County | 1640 |
| 58 | Iroquois County | 1601 |
| 59 | Bureau County | 1571 |
| 60 | White County | 1568 |
| 61 | Edgar County | 1546 |
| 62 | Bond County | 1525 |
| 63 | Grundy County | 1506 |
| 64 | De Witt County | 1498 |
| 65 | Clark County | 1490 |
| 66 | Boone County | 1430 |
| 67 | Richland County | 1402 |
| 68 | Ford County | 1390 |
| 69 | Moultrie County | 1349 |
| 70 | Wabash County | 1294 |
| 71 | Warren County | 1253 |
| 72 | Johnson County | 1248 |
| 73 | Wayne County | 1209 |
| 74 | Lawrence County | 1074 |
| 75 | Union County | 1068 |
| 76 | Greene County | 1036 |
| 77 | Mercer County | 1024 |
| 78 | Massac County | 992 |
| 79 | Cumberland County | 940 |
| 80 | Perry County | 921 |
| 81 | Jasper County | 897 |
| 82 | Mason County | 891 |
| 83 | Piatt County | 889 |
| 84 | Cass County | 883 |
| 85 | Marshall County | 869 |
| 86 | Menard County | 841 |
| 87 | Schuyler County | 766 |
| 88 | Washington County | 699 |
| 89 | Edwards County | 695 |
| 90 | Hamilton County | 557 |
| 91 | Brown County | 483 |
| 92 | Scott County | 445 |
| 93 | Pope County | 377 |
| 94 | Alexander County | 374 |
| 95 | Putnam County | 343 |
| 96 | Pulaski County | 308 |
| 97 | Henderson County | 306 |
| 98 | Stark County | 289 |
| 99 | Hardin County | 262 |
| 100 | Gallatin County | 254 |
| 101 | Calhoun County | 234 |
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