Ranking of Indiana Counties By Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)
Updated on September 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the population of Indiana (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 460,480. Among all Indiana counties, Marion County had the highest population (aged 25 years and above) with an educational attainment of Less than High School Diploma (83,635), followed by Lake County (34,286), and Allen County (24,735).
The chart below shows the top 10 Indiana counties, and the table below shows the ranking of all Indiana 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: Indiana ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Indiana Counties By 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 | Marion County | 83635 |
| 2 | Lake County | 34286 |
| 3 | Allen County | 24735 |
| 4 | Elkhart County | 23619 |
| 5 | St. Joseph County | 15956 |
| 6 | Vanderburgh County | 11142 |
| 7 | LaGrange County | 9436 |
| 8 | Madison County | 9283 |
| 9 | LaPorte County | 8368 |
| 10 | Johnson County | 7709 |
| 11 | Tippecanoe County | 7679 |
| 12 | Clark County | 7621 |
| 13 | Vigo County | 7126 |
| 14 | Porter County | 7058 |
| 15 | Delaware County | 6654 |
| 16 | Kosciusko County | 6577 |
| 17 | Hamilton County | 6183 |
| 18 | Morgan County | 5710 |
| 19 | Hendricks County | 5625 |
| 20 | Noble County | 5450 |
| 21 | Wayne County | 5387 |
| 22 | Howard County | 5225 |
| 23 | Grant County | 5183 |
| 24 | Monroe County | 5001 |
| 25 | Floyd County | 4801 |
| 26 | Daviess County | 4785 |
| 27 | Bartholomew County | 4682 |
| 28 | Marshall County | 4446 |
| 29 | Cass County | 3998 |
| 30 | Hancock County | 3626 |
| 31 | Lawrence County | 3573 |
| 32 | Miami County | 3431 |
| 33 | Shelby County | 3402 |
| 34 | Jackson County | 3381 |
| 35 | Dearborn County | 3254 |
| 36 | Henry County | 3200 |
| 37 | Scott County | 3183 |
| 38 | Dubois County | 2949 |
| 39 | Adams County | 2933 |
| 40 | Clinton County | 2840 |
| 41 | Knox County | 2738 |
| 42 | Harrison County | 2724 |
| 43 | Putnam County | 2663 |
| 44 | DeKalb County | 2637 |
| 45 | Washington County | 2593 |
| 46 | Boone County | 2591 |
| 47 | Greene County | 2547 |
| 48 | Fayette County | 2472 |
| 49 | Montgomery County | 2447 |
| 50 | Jefferson County | 2412 |
| 51 | Warrick County | 2392 |
| 52 | Starke County | 2317 |
| 53 | Owen County | 2161 |
| 54 | Wabash County | 2154 |
| 55 | Jennings County | 2102 |
| 56 | Orange County | 2080 |
| 57 | Ripley County | 1932 |
| 58 | Gibson County | 1921 |
| 59 | Jasper County | 1917 |
| 60 | Sullivan County | 1879 |
| 61 | Randolph County | 1872 |
| 62 | Whitley County | 1864 |
| 63 | White County | 1840 |
| 64 | Franklin County | 1838 |
| 65 | Steuben County | 1809 |
| 66 | Huntington County | 1800 |
| 67 | Parke County | 1753 |
| 68 | Fulton County | 1745 |
| 69 | Jay County | 1647 |
| 70 | Clay County | 1614 |
| 71 | Carroll County | 1549 |
| 72 | Decatur County | 1461 |
| 73 | Fountain County | 1398 |
| 74 | Posey County | 1307 |
| 75 | Wells County | 1292 |
| 76 | Crawford County | 1274 |
| 77 | Perry County | 1259 |
| 78 | Spencer County | 1217 |
| 79 | Newton County | 1211 |
| 80 | Rush County | 1183 |
| 81 | Pulaski County | 1111 |
| 82 | Tipton County | 1033 |
| 83 | Pike County | 1020 |
| 84 | Switzerland County | 1015 |
| 85 | Vermillion County | 933 |
| 86 | Martin County | 870 |
| 87 | Brown County | 822 |
| 88 | Blackford County | 781 |
| 89 | Benton County | 678 |
| 90 | Union County | 610 |
| 91 | Ohio County | 471 |
| 92 | Warren County | 392 |
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