Ranking of Iowa Counties By Population Aged 25 years and above with an Educational attainment of Some College or Associates Degree in 2021 (ACS-5Yrs)
Updated on September 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the population of Iowa (aged 25 years and above) who had an educational attainment of Some College or Associates Degree was 688,911. Among all Iowa counties, Polk County had the highest population (aged 25 years and above) with an educational attainment of Some College or Associates Degree (95,992), followed by Linn County (53,602), and Scott County (38,401).
The chart below shows the top 10 Iowa counties, and the table below shows the ranking of all Iowa 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: Iowa ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Iowa Counties By Population (Aged 25yrs+) with an Educational Attainment of Some College or Associates Degree in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Polk County | 95992 |
| 2 | Linn County | 53602 |
| 3 | Scott County | 38401 |
| 4 | Black Hawk County | 27499 |
| 5 | Johnson County | 24127 |
| 6 | Pottawattamie County | 21874 |
| 7 | Woodbury County | 21372 |
| 8 | Dubuque County | 19311 |
| 9 | Dallas County | 17008 |
| 10 | Story County | 15127 |
| 11 | Warren County | 11618 |
| 12 | Cerro Gordo County | 11166 |
| 13 | Clinton County | 10735 |
| 14 | Des Moines County | 10563 |
| 15 | Jasper County | 9334 |
| 16 | Webster County | 9189 |
| 17 | Muscatine County | 9125 |
| 18 | Lee County | 8859 |
| 19 | Marshall County | 7968 |
| 20 | Wapello County | 7765 |
| 21 | Boone County | 6869 |
| 22 | Sioux County | 6700 |
| 23 | Marion County | 6559 |
| 24 | Benton County | 6346 |
| 25 | Plymouth County | 6044 |
| 26 | Carroll County | 5340 |
| 27 | Bremer County | 5288 |
| 28 | Buchanan County | 5130 |
| 29 | Jones County | 5086 |
| 30 | Dickinson County | 4814 |
| 31 | Washington County | 4795 |
| 32 | Henry County | 4758 |
| 33 | Mahaska County | 4606 |
| 34 | Cedar County | 4601 |
| 35 | Hardin County | 4538 |
| 36 | Fayette County | 4458 |
| 37 | Jackson County | 4424 |
| 38 | Clay County | 4248 |
| 39 | Madison County | 4244 |
| 40 | Kossuth County | 4158 |
| 41 | Winneshiek County | 4149 |
| 42 | Iowa County | 4038 |
| 43 | Page County | 4023 |
| 44 | Butler County | 3902 |
| 45 | Tama County | 3853 |
| 46 | Hamilton County | 3842 |
| 47 | Clayton County | 3698 |
| 48 | Delaware County | 3648 |
| 48 | Floyd County | 3648 |
| 49 | Mills County | 3579 |
| 50 | Buena Vista County | 3477 |
| 51 | Harrison County | 3451 |
| 52 | Jefferson County | 3395 |
| 53 | O'Brien County | 3266 |
| 54 | Wright County | 3262 |
| 55 | Cass County | 3228 |
| 56 | Appanoose County | 3160 |
| 57 | Poweshiek County | 3149 |
| 58 | Allamakee County | 3139 |
| 59 | Grundy County | 3129 |
| 60 | Shelby County | 3050 |
| 61 | Crawford County | 2970 |
| 62 | Union County | 2935 |
| 63 | Guthrie County | 2902 |
| 64 | Montgomery County | 2731 |
| 65 | Sac County | 2730 |
| 66 | Hancock County | 2697 |
| 67 | Winnebago County | 2693 |
| 68 | Cherokee County | 2654 |
| 69 | Mitchell County | 2619 |
| 70 | Lyon County | 2610 |
| 71 | Franklin County | 2602 |
| 72 | Emmet County | 2545 |
| 73 | Palo Alto County | 2512 |
| 74 | Humboldt County | 2498 |
| 75 | Chickasaw County | 2472 |
| 76 | Calhoun County | 2458 |
| 77 | Louisa County | 2424 |
| 78 | Monona County | 2364 |
| 79 | Keokuk County | 2330 |
| 80 | Greene County | 2207 |
| 81 | Lucas County | 2100 |
| 82 | Howard County | 2094 |
| 83 | Worth County | 1998 |
| 84 | Fremont County | 1904 |
| 85 | Adair County | 1842 |
| 86 | Clarke County | 1802 |
| 87 | Pocahontas County | 1788 |
| 88 | Davis County | 1773 |
| 89 | Monroe County | 1719 |
| 90 | Van Buren County | 1685 |
| 91 | Ida County | 1580 |
| 92 | Osceola County | 1464 |
| 93 | Taylor County | 1432 |
| 94 | Wayne County | 1399 |
| 95 | Audubon County | 1383 |
| 96 | Decatur County | 1216 |
| 97 | Ringgold County | 1084 |
| 98 | Adams County | 968 |
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