Data / Rankings / Population aged 18 to 64 / Counties in Indiana

Counties in Indiana by population aged 18 to 64

Monroe County had the highest population aged 18 to 64 of 92 counties in 2021, at 69.5%. Adams County had the lowest, at 52.1%. The median was 57.9% and the figure for Indiana was 59.8%. Source: the U.S. Census Bureau.

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Highest69.5Monroe County
Lowest52.1Adams County
Median57.992 counties
Indiana59.8History

Map of counties, 2021

Adams County: 52.1 %Allen County: 58.9 %Bartholomew County: 59 %Benton County: 57.6 %Blackford County: 56.5 %Boone County: 58.8 %Brown County: 56.5 %Carroll County: 57.1 %Cass County: 57 %Clark County: 60.6 %Clay County: 57.5 %Clinton County: 56.7 %Crawford County: 57.7 %Daviess County: 54.6 %Dearborn County: 58.7 %Decatur County: 58.3 %DeKalb County: 58.2 %Delaware County: 62.4 %Dubois County: 57.6 %Elkhart County: 57.4 %Fayette County: 56.7 %Floyd County: 59.7 %Fountain County: 57.2 %Franklin County: 57 %Fulton County: 55.9 %Gibson County: 57.2 %Grant County: 58.9 %Greene County: 57.4 %Hamilton County: 60 %Hancock County: 58.8 %Harrison County: 58.4 %Hendricks County: 59.9 %Henry County: 59.8 %Howard County: 57.5 %Huntington County: 58.2 %Jackson County: 58.2 %Jasper County: 57.7 %Jay County: 55.3 %Jefferson County: 59.8 %Jennings County: 59.4 %Johnson County: 59.4 %Knox County: 58.5 %Kosciusko County: 58.4 %LaGrange County: 52.8 %Lake County: 59.3 %LaPorte County: 59.7 %Lawrence County: 57.7 %Madison County: 59.1 %Marion County: 62.5 %Marshall County: 56.3 %Martin County: 56.6 %Miami County: 59.9 %Monroe County: 69.5 %Montgomery County: 58.5 %Morgan County: 58.8 %Newton County: 58 %Noble County: 57.8 %Ohio County: 57.2 %Orange County: 56.3 %Owen County: 58.2 %Parke County: 56.5 %Perry County: 59.6 %Pike County: 57 %Porter County: 60.1 %Posey County: 56.9 %Pulaski County: 56.6 %Putnam County: 62.8 %Randolph County: 55.8 %Ripley County: 57 %Rush County: 58.2 %St. Joseph County: 60.1 %Scott County: 60 %Shelby County: 59.2 %Spencer County: 57.5 %Starke County: 57.1 %Steuben County: 59 %Sullivan County: 60.7 %Switzerland County: 57.3 %Tippecanoe County: 66.5 %Tipton County: 56.7 %Union County: 57.2 %Vanderburgh County: 60.2 %Vermillion County: 57.2 %Vigo County: 62.2 %Wabash County: 55.5 %Warren County: 56.5 %Warrick County: 57.4 %Washington County: 58.9 %Wayne County: 57.4 %Wells County: 56 %White County: 55.9 %Whitley County: 58 %
  • Under 57
  • 57 to 58
  • 58 to 59
  • 59 to 60
  • 60 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Monroe County: 69.5 %Monroe County69.5Tippecanoe County: 66.5 %Tippecanoe County66.5Putnam County: 62.8 %Putnam County62.8Marion County: 62.5 %Marion County62.5Delaware County: 62.4 %Delaware County62.4Vigo County: 62.2 %Vigo County62.2Sullivan County: 60.7 %Sullivan County60.7Clark County: 60.6 %Clark County60.6Vanderburgh County: 60.2 %Vanderburgh County60.2St. Joseph County: 60.1 %St. Joseph County60.1Porter County: 60.1 %Porter County60.1Scott County: 60 %Scott County60Hamilton County: 60 %Hamilton County60Miami County: 59.9 %Miami County59.9Hendricks County: 59.9 %Hendricks County59.9Jefferson County: 59.8 %Jefferson County59.8Henry County: 59.8 %Henry County59.8Floyd County: 59.7 %Floyd County59.7LaPorte County: 59.7 %LaPorte County59.7Perry County: 59.6 %Perry County59.6Jennings County: 59.4 %Jennings County59.4Johnson County: 59.4 %Johnson County59.4Lake County: 59.3 %Lake County59.3Shelby County: 59.2 %Shelby County59.2Madison County: 59.1 %Madison County59.1Steuben County: 59 %Steuben County59Bartholomew County: 59 %Bartholomew County59Allen County: 58.9 %Allen County58.9Grant County: 58.9 %Grant County58.9Washington County: 58.9 %Washington County58.9Boone County: 58.8 %Boone County58.8Hancock County: 58.8 %Hancock County58.8Morgan County: 58.8 %Morgan County58.8Dearborn County: 58.7 %Dearborn County58.7Knox County: 58.5 %Knox County58.5Montgomery County: 58.5 %Montgomery County58.5Kosciusko County: 58.4 %Kosciusko County58.4Harrison County: 58.4 %Harrison County58.4Decatur County: 58.3 %Decatur County58.3Owen County: 58.2 %Owen County58.2Monroe County: 69.5 %Monroe County69.5Tippecanoe County: 66.5 %Tippecanoe County66.5Putnam County: 62.8 %Putnam County62.8Marion County: 62.5 %Marion County62.5Delaware County: 62.4 %Delaware County62.4Vigo County: 62.2 %Vigo County62.2Sullivan County: 60.7 %Sullivan County60.7Clark County: 60.6 %Clark County60.6Vanderburgh County: 60.2 %Vanderburgh County60.2St. Joseph County: 60.1 %St. Joseph County60.1Porter County: 60.1 %Porter County60.1Scott County: 60 %Scott County60Hamilton County: 60 %Hamilton County60Miami County: 59.9 %Miami County59.9Hendricks County: 59.9 %Hendricks County59.9Jefferson County: 59.8 %Jefferson County59.8Henry County: 59.8 %Henry County59.8Floyd County: 59.7 %Floyd County59.7LaPorte County: 59.7 %LaPorte County59.7Perry County: 59.6 %Perry County59.6Jennings County: 59.4 %Jennings County59.4Johnson County: 59.4 %Johnson County59.4Lake County: 59.3 %Lake County59.3Shelby County: 59.2 %Shelby County59.2Madison County: 59.1 %Madison County59.1Steuben County: 59 %Steuben County59Bartholomew County: 59 %Bartholomew County59Allen County: 58.9 %Allen County58.9Grant County: 58.9 %Grant County58.9Washington County: 58.9 %Washington County58.9Boone County: 58.8 %Boone County58.8Hancock County: 58.8 %Hancock County58.8Morgan County: 58.8 %Morgan County58.8Dearborn County: 58.7 %Dearborn County58.7Knox County: 58.5 %Knox County58.5Montgomery County: 58.5 %Montgomery County58.5Kosciusko County: 58.4 %Kosciusko County58.4Harrison County: 58.4 %Harrison County58.4Decatur County: 58.3 %Decatur County58.3Owen County: 58.2 %Owen County58.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)Change on 2020
1Monroe County69.5+0.7 pts
2Tippecanoe County66.5-0 pts
3Putnam County62.8-0.2 pts
4Marion County62.5-0.3 pts
5Delaware County62.4-0.1 pts
6Vigo County62.2-0.2 pts
7Sullivan County60.7-0.1 pts
8Clark County60.6-0.1 pts
9Vanderburgh County60.2-0.1 pts
10St. Joseph County60.1-0.2 pts
11Porter County60.1-0.2 pts
12Scott County60+0.2 pts
13Hamilton County60+0.3 pts
14Miami County59.9-1.2 pts
15Hendricks County59.90 pts
16Jefferson County59.8-0.6 pts
17Henry County59.8-0.1 pts
18Floyd County59.7-0.2 pts
19LaPorte County59.7-0.2 pts
20Perry County59.6-0.2 pts
21Jennings County59.4-0.1 pts
22Johnson County59.4+0.1 pts
23Lake County59.3-0.2 pts
24Shelby County59.2-0.2 pts
25Madison County59.1-0 pts
26Steuben County59-0.1 pts
27Bartholomew County59-0.2 pts
28Allen County58.9-0.2 pts
29Grant County58.9-0.2 pts
30Washington County58.9-0.4 pts
31Boone County58.80 pts
32Hancock County58.8-0.1 pts
33Morgan County58.8-0.3 pts
34Dearborn County58.7-0.4 pts
35Knox County58.5-0.3 pts
36Montgomery County58.5+0.1 pts
37Kosciusko County58.4-0.4 pts
38Harrison County58.4-0.3 pts
39Decatur County58.3-0.1 pts
40Owen County58.2-0.2 pts
41Rush County58.2-0.1 pts
42Jackson County58.2-0.2 pts
43DeKalb County58.2-0.2 pts
44Huntington County58.2-0.3 pts
45Newton County58-0.3 pts
46Whitley County58-0.5 pts
47Noble County57.8-0.2 pts
48Jasper County57.7-0 pts
49Lawrence County57.70 pts
50Crawford County57.7-0 pts
51Benton County57.6+0.4 pts
52Dubois County57.6-0.3 pts
53Howard County57.5-0.2 pts
54Spencer County57.5-0.4 pts
55Clay County57.5-0.4 pts
56Greene County57.4-0 pts
57Warrick County57.4-0.1 pts
58Wayne County57.4-0.1 pts
59Elkhart County57.4-0 pts
60Switzerland County57.3-0.4 pts
61Gibson County57.2-0.3 pts
62Union County57.2-0.5 pts
63Fountain County57.2-0 pts
64Ohio County57.2-0.1 pts
65Vermillion County57.2-0.2 pts
66Carroll County57.1-0.4 pts
67Starke County57.1-0.6 pts
68Franklin County57-0.3 pts
69Cass County57-0.3 pts
70Ripley County570 pts
71Pike County57-0 pts
72Posey County56.9-0.7 pts
73Tipton County56.7-0.3 pts
74Clinton County56.7-0.1 pts
75Fayette County56.7-0.2 pts
76Martin County56.6-0.5 pts
77Pulaski County56.6-0.4 pts
78Brown County56.5-0.6 pts
79Warren County56.5-0.2 pts
80Parke County56.5-0.5 pts
81Blackford County56.5-0.4 pts
82Orange County56.3-0.2 pts
83Marshall County56.3-0.1 pts
84Wells County56-0.4 pts
85Fulton County55.9-0.1 pts
86White County55.9-0.3 pts
87Randolph County55.8-0.2 pts
88Wabash County55.5+0.2 pts
89Jay County55.3-0.3 pts
90Daviess County54.6-0.1 pts
91LaGrange County52.80 pts
92Adams County52.1-0.2 pts

Other periods

About this ranking

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.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

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 styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). 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 (Counties in Indiana by population aged 18 to 64, 2021) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

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, Counties in Indiana by population aged 18 to 64, 2021. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/indiana-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. 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. Counties in Indiana by population aged 18 to 64, 2021. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-18-64/indiana-counties?period=2021.

Harvard

U.S. Census Bureau (2026) 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, Counties in Indiana by population aged 18 to 64, 2021 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/indiana-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_indiana_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{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: Counties in Indiana by population aged 18 to 64, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population-18-64/indiana-counties?period=2021. Publisher attribution: 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.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - 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: Counties in Indiana by population aged 18 to 64, 2021
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/population-18-64/indiana-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/indiana-counties?period=2021.
N1  - Publisher attribution: 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.
ER  -
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Questions

Which county has the highest population aged 18 to 64?

Monroe County, with 69.5% in 2021, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Adams County, with 52.1% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: 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. Retrieved 2026-10-12.

Population aged 18 to 64: other rankings

Counties in Indiana: more rankings