Ranking of Illinois Counties By Percentage of Population with Portuguese Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 10.42K people in Illinois with Portuguese ancestry (0.08% of Illinois population). Among all Illinois counties, Cass County had the highest percentage of its population with Portuguese ancestry (0.65%), followed by Morgan County (0.59%), and Greene County (0.44%).
The chart and table below shows the top 10 counties with high percentage of its population having Portuguese 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 Portuguese Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Cass County | 0.65 |
| 2 | Morgan County | 0.59 |
| 3 | Greene County | 0.44 |
| 4 | Scott County | 0.37 |
| 5 | Ford County | 0.34 |
| 5 | Piatt County | 0.34 |
| 6 | Whiteside County | 0.27 |
| 7 | Washington County | 0.23 |
| 8 | Coles County | 0.22 |
| 8 | Sangamon County | 0.22 |
| 9 | Richland County | 0.21 |
| 10 | Jackson County | 0.20 |
| 10 | Mason County | 0.20 |
| 11 | Gallatin County | 0.18 |
| 12 | Effingham County | 0.16 |
| 12 | Fulton County | 0.16 |
| 13 | LaSalle County | 0.15 |
| 13 | Monroe County | 0.15 |
| 14 | Douglas County | 0.14 |
| 15 | Lake County | 0.13 |
| 16 | Adams County | 0.12 |
| 16 | De Witt County | 0.12 |
| 17 | McHenry County | 0.11 |
| 18 | DuPage County | 0.10 |
| 18 | Montgomery County | 0.10 |
| 18 | Williamson County | 0.10 |
| 19 | Champaign County | 0.09 |
| 20 | Cook County | 0.08 |
| 20 | Cumberland County | 0.08 |
| 20 | Madison County | 0.08 |
| 20 | Pike County | 0.08 |
| 20 | Randolph County | 0.08 |
| 20 | Will County | 0.08 |
| 21 | McLean County | 0.07 |
| 21 | Rock Island County | 0.07 |
| 21 | St. Clair County | 0.07 |
| 22 | Bureau County | 0.06 |
| 22 | Christian County | 0.06 |
| 22 | Crawford County | 0.06 |
| 22 | Knox County | 0.06 |
| 22 | Logan County | 0.06 |
| 22 | Peoria County | 0.06 |
| 23 | Hancock County | 0.05 |
| 23 | Henry County | 0.05 |
| 23 | Kane County | 0.05 |
| 23 | Kankakee County | 0.05 |
| 23 | Macon County | 0.05 |
| 23 | Menard County | 0.05 |
| 23 | Stephenson County | 0.05 |
| 24 | Calhoun County | 0.04 |
| 24 | Iroquois County | 0.04 |
| 24 | Macoupin County | 0.04 |
| 24 | Union County | 0.04 |
| 25 | DeKalb County | 0.03 |
| 25 | Jefferson County | 0.03 |
| 25 | Jersey County | 0.03 |
| 25 | Mercer County | 0.03 |
| 25 | Ogle County | 0.03 |
| 25 | Tazewell County | 0.03 |
| 25 | Warren County | 0.03 |
| 26 | Clinton County | 0.02 |
| 26 | Kendall County | 0.02 |
| 26 | Livingston County | 0.02 |
| 26 | McDonough County | 0.02 |
| 26 | Wayne County | 0.02 |
| 26 | Winnebago County | 0.02 |
| 27 | Carroll County | 0.01 |
| 27 | Franklin County | 0.01 |
| 27 | Grundy County | 0.01 |
| 27 | Marion County | 0.01 |
| 27 | Shelby County | 0.01 |
| 27 | Woodford County | 0.01 |
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