Ranking of Illinois Counties By Population with British Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 49.13K people in Illinois with British ancestry. Among all Illinois counties, Cook County had the highest population with British ancestry (15.36K), followed by DuPage County (3.82K), and Lake County (3.24K).
The chart and table below shows the top 10 counties with high number of people with British 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 British Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Cook County | 15363 |
| 2 | DuPage County | 3819 |
| 3 | Lake County | 3235 |
| 4 | Will County | 1871 |
| 5 | Kane County | 1676 |
| 6 | Sangamon County | 1655 |
| 7 | Winnebago County | 1535 |
| 8 | Champaign County | 1515 |
| 9 | McHenry County | 1466 |
| 10 | Peoria County | 1260 |
| 11 | St. Clair County | 1147 |
| 12 | Madison County | 990 |
| 13 | Rock Island County | 804 |
| 14 | McLean County | 766 |
| 15 | Macon County | 742 |
| 16 | Tazewell County | 667 |
| 17 | Kendall County | 431 |
| 18 | Whiteside County | 371 |
| 19 | Henry County | 369 |
| 20 | Adams County | 361 |
| 21 | Williamson County | 346 |
| 22 | Woodford County | 341 |
| 23 | Jackson County | 320 |
| 24 | DeKalb County | 309 |
| 25 | Christian County | 308 |
| 26 | Stephenson County | 304 |
| 27 | Vermilion County | 270 |
| 28 | Logan County | 260 |
| 29 | Grundy County | 245 |
| 30 | Kankakee County | 234 |
| 31 | Piatt County | 229 |
| 32 | Franklin County | 228 |
| 32 | Jefferson County | 228 |
| 33 | Coles County | 225 |
| 34 | Macoupin County | 222 |
| 35 | Livingston County | 221 |
| 36 | Boone County | 218 |
| 37 | LaSalle County | 210 |
| 38 | Marion County | 208 |
| 39 | Lee County | 193 |
| 40 | Monroe County | 188 |
| 40 | Ogle County | 188 |
| 41 | Knox County | 186 |
| 42 | Jo Daviess County | 172 |
| 43 | Fayette County | 162 |
| 44 | Randolph County | 159 |
| 45 | Crawford County | 134 |
| 46 | Moultrie County | 128 |
| 47 | Iroquois County | 120 |
| 48 | De Witt County | 112 |
| 49 | Saline County | 102 |
| 50 | Clark County | 100 |
| 50 | Fulton County | 100 |
| 51 | Effingham County | 98 |
| 51 | McDonough County | 98 |
| 52 | Montgomery County | 92 |
| 53 | Jersey County | 88 |
| 54 | Perry County | 85 |
| 55 | Clinton County | 84 |
| 56 | Richland County | 79 |
| 57 | Morgan County | 77 |
| 58 | Clay County | 72 |
| 59 | Pike County | 71 |
| 60 | Washington County | 70 |
| 61 | Mason County | 65 |
| 62 | Bond County | 64 |
| 63 | Hancock County | 63 |
| 64 | White County | 59 |
| 65 | Schuyler County | 58 |
| 66 | Marshall County | 56 |
| 67 | Bureau County | 55 |
| 67 | Massac County | 55 |
| 67 | Wabash County | 55 |
| 68 | Stark County | 52 |
| 69 | Edgar County | 45 |
| 70 | Union County | 44 |
| 71 | Wayne County | 43 |
| 72 | Ford County | 37 |
| 73 | Shelby County | 36 |
| 74 | Menard County | 33 |
| 75 | Calhoun County | 31 |
| 75 | Scott County | 31 |
| 76 | Douglas County | 29 |
| 77 | Brown County | 28 |
| 77 | Lawrence County | 28 |
| 78 | Mercer County | 27 |
| 79 | Cumberland County | 26 |
| 79 | Warren County | 26 |
| 80 | Greene County | 24 |
| 80 | Johnson County | 24 |
| 81 | Hamilton County | 22 |
| 82 | Gallatin County | 21 |
| 83 | Edwards County | 20 |
| 84 | Carroll County | 19 |
| 85 | Cass County | 14 |
| 86 | Putnam County | 8 |
| 87 | Henderson County | 7 |
| 88 | Pulaski County | 2 |
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