Ranking of Illinois Counties By Population Aged 25 years and above with an Educational attainment of Bachelors or Higher in 2021 (ACS-5Yrs)
Updated on September 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the population of Illinois (aged 25 years and above) who had an educational attainment of Bachelors or Higher was 3,169,569. Among all Illinois counties, Cook County had the highest population (aged 25 years and above) with an educational attainment of Bachelors or Higher (1,489,931), followed by DuPage County (325,349), and Lake County (217,451).
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.
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 Population (Aged 25yrs+) with an Educational Attainment of Bachelors or Higher in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Cook County | 1489931 |
| 2 | DuPage County | 325349 |
| 3 | Lake County | 217451 |
| 4 | Will County | 162906 |
| 5 | Kane County | 122594 |
| 6 | McHenry County | 74658 |
| 7 | Champaign County | 54738 |
| 8 | Madison County | 52992 |
| 9 | St. Clair County | 52283 |
| 10 | McLean County | 47627 |
| 11 | Sangamon County | 46544 |
| 12 | Winnebago County | 45227 |
| 13 | Peoria County | 40342 |
| 14 | Kendall County | 29326 |
| 15 | Tazewell County | 25557 |
| 16 | Rock Island County | 23446 |
| 17 | DeKalb County | 19844 |
| 18 | Macon County | 16852 |
| 19 | Kankakee County | 14861 |
| 20 | LaSalle County | 14362 |
| 21 | Williamson County | 12764 |
| 22 | Adams County | 11810 |
| 23 | Jackson County | 11057 |
| 24 | Grundy County | 9299 |
| 25 | Monroe County | 9121 |
| 26 | Woodford County | 9059 |
| 27 | Boone County | 8795 |
| 28 | Henry County | 8355 |
| 29 | Vermilion County | 8350 |
| 30 | Coles County | 7856 |
| 31 | Ogle County | 7766 |
| 32 | Whiteside County | 7398 |
| 33 | Knox County | 6855 |
| 34 | Stephenson County | 6793 |
| 35 | Clinton County | 6093 |
| 36 | Macoupin County | 5924 |
| 37 | Effingham County | 5478 |
| 38 | McDonough County | 5342 |
| 39 | Morgan County | 4876 |
| 40 | Bureau County | 4843 |
| 41 | Franklin County | 4762 |
| 42 | Jefferson County | 4755 |
| 43 | Lee County | 4680 |
| 44 | Fulton County | 4518 |
| 45 | Christian County | 4413 |
| 46 | Marion County | 4243 |
| 47 | Livingston County | 4238 |
| 48 | Logan County | 4159 |
| 49 | Jo Daviess County | 4147 |
| 50 | Montgomery County | 3696 |
| 51 | Piatt County | 3650 |
| 52 | Jersey County | 3364 |
| 53 | Saline County | 3291 |
| 54 | Hancock County | 3149 |
| 55 | Iroquois County | 3082 |
| 56 | Randolph County | 2925 |
| 57 | Union County | 2818 |
| 58 | Shelby County | 2633 |
| 59 | Clark County | 2538 |
| 60 | Bond County | 2534 |
| 61 | Douglas County | 2511 |
| 62 | Warren County | 2466 |
| 63 | Crawford County | 2383 |
| 64 | De Witt County | 2344 |
| 65 | Edgar County | 2270 |
| 66 | Carroll County | 2263 |
| 67 | Washington County | 2253 |
| 68 | Richland County | 2133 |
| 69 | Menard County | 2118 |
| 70 | Mercer County | 2109 |
| 71 | Ford County | 2053 |
| 72 | Moultrie County | 1947 |
| 73 | Fayette County | 1916 |
| 74 | Pike County | 1825 |
| 75 | Perry County | 1777 |
| 76 | Wayne County | 1736 |
| 77 | Johnson County | 1675 |
| 78 | White County | 1619 |
| 79 | Cass County | 1599 |
| 79 | Mason County | 1599 |
| 80 | Marshall County | 1544 |
| 81 | Lawrence County | 1500 |
| 81 | Wabash County | 1500 |
| 82 | Cumberland County | 1423 |
| 83 | Greene County | 1422 |
| 84 | Clay County | 1381 |
| 85 | Massac County | 1341 |
| 86 | Jasper County | 1289 |
| 87 | Hamilton County | 1069 |
| 88 | Schuyler County | 924 |
| 89 | Henderson County | 903 |
| 90 | Putnam County | 821 |
| 91 | Scott County | 773 |
| 92 | Stark County | 756 |
| 93 | Brown County | 601 |
| 94 | Edwards County | 589 |
| 95 | Calhoun County | 577 |
| 96 | Pulaski County | 555 |
| 97 | Alexander County | 468 |
| 98 | Pope County | 421 |
| 99 | Gallatin County | 405 |
| 100 | Hardin County | 392 |
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