Ranking of Illinois Counties By White Alone Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)
Updated on September 5, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the Illinois White Alone population (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 453,197. Among all Illinois counties, Cook County had the highest White Alone population (aged 25 years and above) with an educational attainment of Less than High School Diploma (168,631), followed by DuPage County (21,866), and Kane County (20,333).
The chart below shows the top 10 Illinois counties, and the table below shows the ranking of all Illinois counties.
You can see similar information for other educational attainments, and for other races and ethnicities.
You can also see similar information for other states and for the United States.
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Related Topics: Illinois ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Illinois Counties By White Alone Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Cook County | 168631 |
| 2 | DuPage County | 21866 |
| 3 | Kane County | 20333 |
| 4 | Lake County | 20278 |
| 5 | Will County | 20262 |
| 6 | Winnebago County | 14896 |
| 7 | Madison County | 10502 |
| 8 | McHenry County | 10490 |
| 9 | Sangamon County | 6594 |
| 10 | St. Clair County | 6248 |
| 11 | Rock Island County | 6195 |
| 12 | Tazewell County | 5651 |
| 13 | LaSalle County | 5488 |
| 14 | Peoria County | 5432 |
| 15 | Kankakee County | 4665 |
| 16 | Macon County | 4022 |
| 17 | Vermilion County | 3577 |
| 18 | Champaign County | 3270 |
| 19 | Boone County | 3158 |
| 20 | Kendall County | 3032 |
| 21 | McLean County | 2958 |
| 22 | Adams County | 2943 |
| 23 | Whiteside County | 2909 |
| 24 | DeKalb County | 2905 |
| 25 | Williamson County | 2900 |
| 26 | Franklin County | 2730 |
| 27 | Ogle County | 2728 |
| 28 | Knox County | 2683 |
| 29 | Macoupin County | 2665 |
| 30 | Marion County | 2624 |
| 31 | Christian County | 2401 |
| 32 | Coles County | 2198 |
| 33 | Jefferson County | 2151 |
| 34 | Henry County | 2111 |
| 35 | Fulton County | 2069 |
| 36 | Montgomery County | 2047 |
| 37 | Morgan County | 2014 |
| 38 | Douglas County | 1978 |
| 39 | Randolph County | 1972 |
| 40 | Stephenson County | 1963 |
| 41 | Jackson County | 1954 |
| 42 | Lee County | 1920 |
| 43 | Saline County | 1895 |
| 44 | Bureau County | 1870 |
| 45 | Livingston County | 1845 |
| 46 | Iroquois County | 1835 |
| 47 | Grundy County | 1830 |
| 48 | Clinton County | 1781 |
| 49 | Perry County | 1747 |
| 50 | Fayette County | 1714 |
| 51 | Effingham County | 1510 |
| 52 | Woodford County | 1445 |
| 53 | Edgar County | 1373 |
| 54 | Crawford County | 1368 |
| 55 | Wayne County | 1333 |
| 56 | Logan County | 1293 |
| 57 | Moultrie County | 1281 |
| 58 | Union County | 1231 |
| 59 | Massac County | 1189 |
| 60 | Jo Daviess County | 1187 |
| 61 | Johnson County | 1115 |
| 62 | Carroll County | 1107 |
| 63 | Jersey County | 1102 |
| 64 | Bond County | 1092 |
| 65 | Monroe County | 1071 |
| 66 | Lawrence County | 1036 |
| 67 | Shelby County | 1025 |
| 68 | Clay County | 1015 |
| 69 | Cass County | 995 |
| 70 | Warren County | 984 |
| 71 | White County | 965 |
| 72 | Mason County | 834 |
| 73 | Richland County | 831 |
| 74 | Pike County | 804 |
| 75 | Hancock County | 788 |
| 76 | McDonough County | 787 |
| 77 | Greene County | 769 |
| 78 | Mercer County | 764 |
| 79 | Clark County | 718 |
| 80 | Piatt County | 707 |
| 81 | Washington County | 689 |
| 82 | De Witt County | 678 |
| 83 | Ford County | 666 |
| 84 | Hamilton County | 655 |
| 85 | Wabash County | 648 |
| 86 | Marshall County | 593 |
| 87 | Jasper County | 496 |
| 88 | Cumberland County | 462 |
| 89 | Gallatin County | 440 |
| 90 | Hardin County | 425 |
| 91 | Alexander County | 391 |
| 92 | Brown County | 386 |
| 93 | Stark County | 382 |
| 94 | Henderson County | 366 |
| 95 | Menard County | 348 |
| 96 | Schuyler County | 344 |
| 97 | Edwards County | 339 |
| 98 | Pope County | 298 |
| 99 | Pulaski County | 256 |
| 100 | Putnam County | 243 |
| 101 | Calhoun County | 238 |
| 102 | Scott County | 205 |
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