# Counties in Indiana by population aged 18 to 64, 2025

All 92 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_18_64_share`
- Unit: %
- Definition: Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.
- Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (https://www.census.gov/programs-surveys/popest/data/data-sets.html)
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/population-18-64/indiana-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Monroe County | 68.7 |
| 2 | Tippecanoe County | 66.1 |
| 3 | Delaware County | 61.9 |
| 4 | Marion County | 61.5 |
| 5 | Putnam County | 61.4 |
| 6 | Vigo County | 61.3 |
| 7 | Clark County | 60.2 |
| 8 | Scott County | 59.9 |
| 9 | Hamilton County | 59.9 |
| 10 | Sullivan County | 59.5 |
| 11 | St. Joseph County | 59.4 |
| 12 | Miami County | 59.3 |
| 13 | Perry County | 59.2 |
| 14 | Madison County | 59.1 |
| 15 | Hendricks County | 59.1 |
| 16 | Porter County | 59 |
| 17 | Vanderburgh County | 58.9 |
| 18 | Johnson County | 58.9 |
| 19 | Floyd County | 58.9 |
| 20 | Henry County | 58.7 |
| 21 | Boone County | 58.6 |
| 22 | Bartholomew County | 58.6 |
| 23 | LaPorte County | 58.5 |
| 24 | Jefferson County | 58.4 |
| 25 | Lake County | 58.4 |
| 26 | Hancock County | 58.3 |
| 27 | Allen County | 58.3 |
| 28 | Jennings County | 58.3 |
| 29 | Grant County | 58 |
| 30 | Washington County | 57.7 |
| 31 | Knox County | 57.7 |
| 32 | Morgan County | 57.6 |
| 33 | Dearborn County | 57.5 |
| 34 | Owen County | 57.4 |
| 35 | Elkhart County | 57.4 |
| 36 | Shelby County | 57.4 |
| 37 | Montgomery County | 57.3 |
| 38 | Lawrence County | 57.2 |
| 39 | Kosciusko County | 57.2 |
| 40 | Rush County | 57.2 |
| 41 | Switzerland County | 57.2 |
| 42 | Huntington County | 57.1 |
| 43 | DeKalb County | 57.1 |
| 44 | Decatur County | 57.1 |
| 45 | Steuben County | 57 |
| 46 | Newton County | 56.9 |
| 47 | Jackson County | 56.9 |
| 48 | Benton County | 56.8 |
| 49 | Jasper County | 56.8 |
| 50 | Vermillion County | 56.7 |
| 51 | Wayne County | 56.7 |
| 52 | Gibson County | 56.6 |
| 53 | Harrison County | 56.6 |
| 54 | Noble County | 56.5 |
| 55 | Greene County | 56.5 |
| 56 | Clinton County | 56.4 |
| 57 | Howard County | 56.4 |
| 58 | Warrick County | 56.3 |
| 59 | Carroll County | 56.3 |
| 60 | Cass County | 56.2 |
| 61 | Fayette County | 56.1 |
| 62 | Pike County | 56.1 |
| 63 | Clay County | 56.1 |
| 64 | Crawford County | 56 |
| 65 | Spencer County | 56 |
| 66 | Franklin County | 56 |
| 67 | Union County | 55.9 |
| 68 | Tipton County | 55.8 |
| 69 | Marshall County | 55.8 |
| 70 | Whitley County | 55.8 |
| 71 | Dubois County | 55.6 |
| 72 | Starke County | 55.6 |
| 73 | Posey County | 55.5 |
| 74 | Fountain County | 55.5 |
| 75 | Ripley County | 55.5 |
| 76 | Warren County | 55.3 |
| 77 | Blackford County | 55.3 |
| 78 | Parke County | 55 |
| 79 | Ohio County | 54.9 |
| 80 | Wabash County | 54.8 |
| 81 | Randolph County | 54.7 |
| 82 | Wells County | 54.7 |
| 83 | Pulaski County | 54.7 |
| 84 | Brown County | 54.5 |
| 85 | Fulton County | 54.3 |
| 86 | Orange County | 54.3 |
| 87 | Martin County | 54.3 |
| 88 | Jay County | 54.1 |
| 89 | White County | 54 |
| 90 | Daviess County | 53.2 |
| 91 | LaGrange County | 52.7 |
| 92 | Adams County | 51.4 |