Ranking of Illinois Counties By Percentage of Population with Polish Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 825.04K people in Illinois with Polish ancestry (6.44% of Illinois population). Among all Illinois counties, McHenry County had the highest percentage of its population with Polish ancestry (11.80%), followed by Washington County (11.67%), and Will County (11.52%).
The chart and table below shows the top 10 counties with high percentage of its population having Polish 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 Polish Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | McHenry County | 11.80 |
| 2 | Washington County | 11.67 |
| 3 | Will County | 11.52 |
| 4 | DuPage County | 10.30 |
| 5 | Putnam County | 9.93 |
| 6 | Grundy County | 9.67 |
| 7 | Lake County | 7.90 |
| 8 | Kendall County | 7.70 |
| 9 | Cook County | 7.48 |
| 10 | LaSalle County | 7.16 |
| 11 | Boone County | 7.06 |
| 12 | Kane County | 6.68 |
| 13 | DeKalb County | 6.20 |
| 14 | Kankakee County | 5.90 |
| 15 | Perry County | 5.63 |
| 16 | Bureau County | 5.33 |
| 17 | Jo Daviess County | 4.78 |
| 18 | Marshall County | 3.96 |
| 19 | Winnebago County | 3.62 |
| 20 | Woodford County | 3.39 |
| 21 | Lee County | 3.36 |
| 22 | Ogle County | 3.30 |
| 23 | McLean County | 3.11 |
| 24 | Livingston County | 3.02 |
| 25 | Henry County | 3.01 |
| 26 | Champaign County | 3.00 |
| 27 | Monroe County | 2.90 |
| 28 | Carroll County | 2.84 |
| 28 | Franklin County | 2.84 |
| 29 | De Witt County | 2.72 |
| 30 | Marion County | 2.59 |
| 31 | Iroquois County | 2.55 |
| 32 | Whiteside County | 2.50 |
| 33 | St. Clair County | 2.48 |
| 34 | Piatt County | 2.45 |
| 35 | Menard County | 2.41 |
| 36 | Jefferson County | 2.38 |
| 37 | Logan County | 2.35 |
| 38 | Jackson County | 2.30 |
| 39 | Madison County | 2.29 |
| 40 | Williamson County | 2.28 |
| 41 | McDonough County | 2.26 |
| 42 | Clinton County | 2.20 |
| 43 | Clay County | 2.16 |
| 44 | Johnson County | 2.15 |
| 45 | Massac County | 2.10 |
| 46 | Stephenson County | 2.07 |
| 47 | Rock Island County | 1.96 |
| 48 | White County | 1.91 |
| 49 | Sangamon County | 1.85 |
| 50 | Tazewell County | 1.83 |
| 51 | Peoria County | 1.81 |
| 52 | Shelby County | 1.76 |
| 52 | Vermilion County | 1.76 |
| 53 | Pope County | 1.73 |
| 54 | Ford County | 1.68 |
| 55 | Macon County | 1.65 |
| 56 | Montgomery County | 1.64 |
| 57 | Macoupin County | 1.63 |
| 58 | Christian County | 1.59 |
| 59 | Randolph County | 1.53 |
| 60 | Mason County | 1.48 |
| 61 | Coles County | 1.46 |
| 62 | Hardin County | 1.41 |
| 63 | Stark County | 1.36 |
| 64 | Clark County | 1.35 |
| 65 | Edwards County | 1.33 |
| 66 | Scott County | 1.32 |
| 67 | Gallatin County | 1.31 |
| 67 | Saline County | 1.31 |
| 68 | Calhoun County | 1.26 |
| 69 | Union County | 1.25 |
| 70 | Effingham County | 1.22 |
| 71 | Richland County | 1.21 |
| 72 | Knox County | 1.20 |
| 72 | Pike County | 1.20 |
| 73 | Jasper County | 1.19 |
| 74 | Henderson County | 1.17 |
| 75 | Douglas County | 1.13 |
| 76 | Edgar County | 1.12 |
| 77 | Brown County | 1.04 |
| 78 | Warren County | 1.01 |
| 79 | Fulton County | 1.00 |
| 80 | Morgan County | 0.97 |
| 81 | Adams County | 0.95 |
| 82 | Jersey County | 0.93 |
| 83 | Bond County | 0.92 |
| 84 | Crawford County | 0.91 |
| 85 | Greene County | 0.90 |
| 86 | Cass County | 0.89 |
| 87 | Wabash County | 0.86 |
| 88 | Cumberland County | 0.85 |
| 89 | Moultrie County | 0.75 |
| 90 | Lawrence County | 0.71 |
| 91 | Fayette County | 0.70 |
| 91 | Hamilton County | 0.70 |
| 92 | Wayne County | 0.63 |
| 93 | Mercer County | 0.58 |
| 94 | Hancock County | 0.56 |
| 95 | Schuyler County | 0.48 |
| 96 | Alexander County | 0.11 |
| 97 | Pulaski County | 0.10 |
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