Ranking of Illinois Counties By Population with Welsh Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 47.72K people in Illinois with Welsh ancestry. Among all Illinois counties, Cook County had the highest population with Welsh ancestry (12.54K), followed by DuPage County (3.49K), and Lake County (2.13K).
The chart and table below shows the top 10 counties with high number of people with Welsh 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 Welsh Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Cook County | 12536 |
| 2 | DuPage County | 3490 |
| 3 | Lake County | 2125 |
| 4 | Will County | 1993 |
| 5 | Madison County | 1771 |
| 6 | Kane County | 1587 |
| 7 | Sangamon County | 1465 |
| 8 | Peoria County | 1357 |
| 9 | St. Clair County | 1305 |
| 10 | McHenry County | 1286 |
| 11 | Winnebago County | 1268 |
| 12 | Champaign County | 1113 |
| 13 | McLean County | 975 |
| 14 | Rock Island County | 904 |
| 15 | Tazewell County | 845 |
| 16 | Williamson County | 670 |
| 17 | Macon County | 669 |
| 18 | Kankakee County | 586 |
| 19 | Coles County | 541 |
| 20 | Vermilion County | 492 |
| 21 | DeKalb County | 470 |
| 22 | Stephenson County | 384 |
| 23 | LaSalle County | 368 |
| 24 | Henry County | 363 |
| 25 | Franklin County | 359 |
| 26 | Jackson County | 355 |
| 27 | Montgomery County | 347 |
| 28 | Adams County | 344 |
| 29 | Boone County | 304 |
| 30 | Kendall County | 289 |
| 31 | Bond County | 284 |
| 32 | Morgan County | 274 |
| 33 | Fulton County | 258 |
| 34 | Bureau County | 242 |
| 35 | Jo Daviess County | 230 |
| 36 | Knox County | 229 |
| 37 | Jefferson County | 222 |
| 38 | Saline County | 219 |
| 39 | Iroquois County | 214 |
| 39 | Woodford County | 214 |
| 40 | Ogle County | 197 |
| 41 | Macoupin County | 195 |
| 42 | Piatt County | 183 |
| 43 | Logan County | 179 |
| 44 | Perry County | 168 |
| 45 | Whiteside County | 164 |
| 46 | Marion County | 144 |
| 46 | Warren County | 144 |
| 47 | Monroe County | 140 |
| 48 | Randolph County | 138 |
| 49 | Christian County | 137 |
| 49 | Moultrie County | 137 |
| 50 | Hamilton County | 136 |
| 51 | Clark County | 123 |
| 52 | Douglas County | 116 |
| 53 | Hancock County | 113 |
| 54 | Grundy County | 112 |
| 55 | Clay County | 105 |
| 56 | McDonough County | 104 |
| 56 | Richland County | 104 |
| 57 | Effingham County | 103 |
| 58 | Union County | 101 |
| 59 | Mason County | 96 |
| 60 | Marshall County | 86 |
| 61 | Lee County | 83 |
| 62 | Washington County | 81 |
| 63 | Mercer County | 79 |
| 64 | Fayette County | 68 |
| 64 | Jersey County | 68 |
| 65 | Gallatin County | 67 |
| 66 | Carroll County | 65 |
| 67 | Crawford County | 64 |
| 67 | Menard County | 64 |
| 68 | Shelby County | 61 |
| 69 | De Witt County | 57 |
| 70 | Johnson County | 55 |
| 70 | Livingston County | 55 |
| 71 | Clinton County | 53 |
| 71 | White County | 53 |
| 72 | Henderson County | 51 |
| 73 | Edwards County | 48 |
| 74 | Ford County | 47 |
| 75 | Wabash County | 41 |
| 76 | Pulaski County | 38 |
| 76 | Wayne County | 38 |
| 77 | Greene County | 35 |
| 78 | Putnam County | 34 |
| 79 | Schuyler County | 33 |
| 80 | Alexander County | 32 |
| 81 | Jasper County | 31 |
| 82 | Cumberland County | 27 |
| 82 | Lawrence County | 27 |
| 83 | Edgar County | 20 |
| 84 | Brown County | 16 |
| 85 | Stark County | 15 |
| 86 | Pike County | 12 |
| 87 | Pope County | 10 |
| 88 | Hardin County | 7 |
| 89 | Cass County | 6 |
| 90 | Calhoun County | 4 |
| 91 | Scott County | 3 |
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