Ranking of Illinois Counties By Population with Czechoslovakian Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 14.25K people in Illinois with Czechoslovakian ancestry. Among all Illinois counties, Cook County had the highest population with Czechoslovakian ancestry (5.24K), followed by DuPage County (1.51K), and Will County (1.50K).
The chart and table below shows the top 10 counties with high number of people with Czechoslovakian 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 Czechoslovakian Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Cook County | 5236 |
| 2 | DuPage County | 1513 |
| 3 | Will County | 1495 |
| 4 | Lake County | 1056 |
| 5 | Madison County | 552 |
| 6 | McHenry County | 502 |
| 7 | Kane County | 446 |
| 8 | Sangamon County | 371 |
| 9 | Peoria County | 267 |
| 10 | St. Clair County | 230 |
| 11 | DeKalb County | 213 |
| 12 | Kendall County | 180 |
| 13 | LaSalle County | 174 |
| 14 | Champaign County | 155 |
| 15 | McLean County | 145 |
| 16 | Winnebago County | 135 |
| 17 | Jackson County | 105 |
| 18 | Montgomery County | 99 |
| 19 | Coles County | 94 |
| 20 | Henry County | 88 |
| 21 | Grundy County | 86 |
| 22 | Boone County | 84 |
| 23 | Rock Island County | 73 |
| 24 | Tazewell County | 71 |
| 25 | Ogle County | 61 |
| 26 | Kankakee County | 57 |
| 27 | Whiteside County | 51 |
| 28 | White County | 49 |
| 29 | Williamson County | 48 |
| 30 | Stephenson County | 42 |
| 31 | Christian County | 41 |
| 32 | Bureau County | 37 |
| 32 | Macoupin County | 37 |
| 33 | Marion County | 34 |
| 34 | Franklin County | 33 |
| 34 | Macon County | 33 |
| 35 | Lee County | 30 |
| 36 | Woodford County | 21 |
| 37 | Monroe County | 19 |
| 38 | Piatt County | 17 |
| 38 | Vermilion County | 17 |
| 39 | Carroll County | 16 |
| 40 | Clinton County | 15 |
| 40 | Knox County | 15 |
| 40 | Washington County | 15 |
| 41 | Iroquois County | 14 |
| 42 | Logan County | 13 |
| 43 | Menard County | 11 |
| 43 | Perry County | 11 |
| 43 | Saline County | 11 |
| 44 | Effingham County | 10 |
| 45 | Adams County | 9 |
| 45 | Douglas County | 9 |
| 45 | Jo Daviess County | 9 |
| 45 | Lawrence County | 9 |
| 45 | Marshall County | 9 |
| 45 | Randolph County | 9 |
| 46 | Crawford County | 7 |
| 46 | Mercer County | 7 |
| 47 | Fayette County | 6 |
| 48 | Edgar County | 5 |
| 48 | Livingston County | 5 |
| 48 | Scott County | 5 |
| 49 | Clark County | 4 |
| 49 | Clay County | 4 |
| 49 | Cumberland County | 4 |
| 49 | Moultrie County | 4 |
| 50 | Morgan County | 3 |
| 50 | Shelby County | 3 |
| 50 | Union County | 3 |
| 51 | Ford County | 2 |
| 51 | Johnson County | 2 |
| 51 | Pulaski County | 2 |
| 52 | Bond County | 1 |
| 52 | Jefferson County | 1 |
| 52 | Jersey County | 1 |
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