Ranking of Illinois Counties By Population with Scotch Irish Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 68.31K people in Illinois with Scotch Irish ancestry. Among all Illinois counties, Cook County had the highest population with Scotch Irish ancestry (15.00K), followed by DuPage County (4.62K), and Lake County (3.48K).
The chart and table below shows the top 10 counties with high number of people with Scotch Irish 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 Scotch Irish Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Cook County | 15002 |
| 2 | DuPage County | 4617 |
| 3 | Lake County | 3477 |
| 4 | Will County | 3070 |
| 5 | McHenry County | 2689 |
| 6 | Kane County | 2579 |
| 7 | Madison County | 2481 |
| 8 | Sangamon County | 2174 |
| 9 | Champaign County | 1907 |
| 10 | Winnebago County | 1647 |
| 11 | St. Clair County | 1580 |
| 12 | Peoria County | 1535 |
| 13 | Tazewell County | 1324 |
| 14 | McLean County | 1103 |
| 15 | LaSalle County | 1052 |
| 16 | Macon County | 985 |
| 17 | Rock Island County | 973 |
| 18 | Knox County | 725 |
| 19 | Jackson County | 709 |
| 20 | Adams County | 686 |
| 21 | Williamson County | 658 |
| 22 | Randolph County | 644 |
| 23 | Kankakee County | 617 |
| 24 | Kendall County | 602 |
| 25 | Henry County | 595 |
| 26 | Clinton County | 532 |
| 27 | Grundy County | 528 |
| 28 | DeKalb County | 520 |
| 29 | Coles County | 470 |
| 30 | Christian County | 458 |
| 31 | Vermilion County | 436 |
| 32 | Whiteside County | 420 |
| 33 | Franklin County | 417 |
| 34 | Ogle County | 416 |
| 35 | Marion County | 402 |
| 36 | Bond County | 384 |
| 37 | Livingston County | 372 |
| 38 | Saline County | 359 |
| 39 | Montgomery County | 354 |
| 40 | Woodford County | 341 |
| 41 | Jefferson County | 336 |
| 42 | Effingham County | 312 |
| 43 | Morgan County | 308 |
| 44 | Mercer County | 297 |
| 45 | Logan County | 275 |
| 46 | Lee County | 267 |
| 47 | De Witt County | 253 |
| 48 | Macoupin County | 238 |
| 49 | Bureau County | 235 |
| 50 | Monroe County | 234 |
| 51 | Fulton County | 233 |
| 52 | Wayne County | 227 |
| 53 | Warren County | 204 |
| 53 | Washington County | 204 |
| 54 | Mason County | 199 |
| 54 | Stephenson County | 199 |
| 55 | Piatt County | 192 |
| 56 | Perry County | 190 |
| 57 | White County | 189 |
| 58 | Fayette County | 188 |
| 59 | Iroquois County | 182 |
| 60 | Menard County | 181 |
| 61 | Crawford County | 165 |
| 62 | Hardin County | 160 |
| 63 | Hancock County | 158 |
| 64 | McDonough County | 156 |
| 65 | Jersey County | 151 |
| 66 | Edgar County | 144 |
| 67 | Jo Daviess County | 142 |
| 68 | Boone County | 141 |
| 69 | Shelby County | 138 |
| 70 | Massac County | 133 |
| 71 | Ford County | 120 |
| 72 | Cumberland County | 108 |
| 73 | Pike County | 106 |
| 73 | Union County | 106 |
| 74 | Clark County | 82 |
| 75 | Douglas County | 80 |
| 75 | Wabash County | 80 |
| 76 | Edwards County | 79 |
| 77 | Moultrie County | 77 |
| 78 | Schuyler County | 76 |
| 79 | Alexander County | 74 |
| 79 | Stark County | 74 |
| 80 | Marshall County | 71 |
| 81 | Clay County | 66 |
| 82 | Lawrence County | 64 |
| 83 | Greene County | 57 |
| 83 | Scott County | 57 |
| 84 | Brown County | 54 |
| 84 | Johnson County | 54 |
| 85 | Henderson County | 46 |
| 86 | Cass County | 45 |
| 87 | Carroll County | 40 |
| 88 | Putnam County | 39 |
| 89 | Jasper County | 36 |
| 90 | Richland County | 35 |
| 91 | Gallatin County | 33 |
| 92 | Pope County | 26 |
| 93 | Pulaski County | 22 |
| 94 | Calhoun County | 21 |
| 95 | Hamilton County | 15 |
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