Ranking of Illinois Counties By Percentage of 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 (0.11% of Illinois population). Among all Illinois counties, Montgomery County had the highest percentage of its population with Czechoslovakian ancestry (0.35%), followed by White County (0.35%), and Will County (0.22%).
The chart and table below shows the top 10 counties with high percentage of its population having 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 Percentage of Population with Czechoslovakian Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Montgomery County | 0.35 |
| 1 | White County | 0.35 |
| 2 | Will County | 0.22 |
| 3 | DeKalb County | 0.21 |
| 3 | Madison County | 0.21 |
| 4 | Coles County | 0.20 |
| 4 | Jackson County | 0.20 |
| 5 | Sangamon County | 0.19 |
| 6 | Henry County | 0.18 |
| 7 | Boone County | 0.16 |
| 7 | DuPage County | 0.16 |
| 7 | Grundy County | 0.16 |
| 7 | LaSalle County | 0.16 |
| 7 | McHenry County | 0.16 |
| 8 | Lake County | 0.15 |
| 8 | Peoria County | 0.15 |
| 9 | Kendall County | 0.14 |
| 10 | Christian County | 0.12 |
| 10 | Ogle County | 0.12 |
| 11 | Bureau County | 0.11 |
| 11 | Washington County | 0.11 |
| 12 | Carroll County | 0.10 |
| 12 | Cook County | 0.10 |
| 12 | Piatt County | 0.10 |
| 12 | Scott County | 0.10 |
| 13 | Franklin County | 0.09 |
| 13 | Kane County | 0.09 |
| 13 | Lee County | 0.09 |
| 13 | McLean County | 0.09 |
| 13 | Marion County | 0.09 |
| 13 | Menard County | 0.09 |
| 13 | St. Clair County | 0.09 |
| 13 | Stephenson County | 0.09 |
| 13 | Whiteside County | 0.09 |
| 14 | Champaign County | 0.08 |
| 14 | Macoupin County | 0.08 |
| 14 | Marshall County | 0.08 |
| 15 | Williamson County | 0.07 |
| 16 | Lawrence County | 0.06 |
| 16 | Monroe County | 0.06 |
| 17 | Douglas County | 0.05 |
| 17 | Iroquois County | 0.05 |
| 17 | Kankakee County | 0.05 |
| 17 | Logan County | 0.05 |
| 17 | Perry County | 0.05 |
| 17 | Rock Island County | 0.05 |
| 17 | Saline County | 0.05 |
| 17 | Tazewell County | 0.05 |
| 17 | Winnebago County | 0.05 |
| 17 | Woodford County | 0.05 |
| 18 | Clinton County | 0.04 |
| 18 | Crawford County | 0.04 |
| 18 | Cumberland County | 0.04 |
| 18 | Jo Daviess County | 0.04 |
| 18 | Mercer County | 0.04 |
| 18 | Pulaski County | 0.04 |
| 19 | Clark County | 0.03 |
| 19 | Clay County | 0.03 |
| 19 | Edgar County | 0.03 |
| 19 | Effingham County | 0.03 |
| 19 | Fayette County | 0.03 |
| 19 | Knox County | 0.03 |
| 19 | Macon County | 0.03 |
| 19 | Moultrie County | 0.03 |
| 19 | Randolph County | 0.03 |
| 20 | Ford County | 0.02 |
| 20 | Johnson County | 0.02 |
| 20 | Union County | 0.02 |
| 20 | Vermilion County | 0.02 |
| 21 | Adams County | 0.01 |
| 21 | Bond County | 0.01 |
| 21 | Jersey County | 0.01 |
| 21 | Livingston County | 0.01 |
| 21 | Morgan County | 0.01 |
| 21 | Shelby County | 0.01 |
| 22 | Jefferson County | 0.003 |
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