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 2019, at 69.2%. Adams County had the lowest, at 52.8%. The median was 58.5% and the figure for Indiana was 60.3%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest69.2Monroe County
Lowest52.8Adams County
Median58.592 counties
Indiana60.3History

Map of counties, 2019

Adams County: 52.8 %Allen County: 59.4 %Bartholomew County: 59.5 %Benton County: 56.5 %Blackford County: 56.9 %Boone County: 59.1 %Brown County: 57.1 %Carroll County: 57.4 %Cass County: 57.6 %Clark County: 61 %Clay County: 58.7 %Clinton County: 57.2 %Crawford County: 58 %Daviess County: 55 %Dearborn County: 59.6 %Decatur County: 58.6 %DeKalb County: 58.9 %Delaware County: 62.7 %Dubois County: 58.4 %Elkhart County: 57.8 %Fayette County: 57.4 %Floyd County: 60.5 %Fountain County: 57.6 %Franklin County: 57.7 %Fulton County: 56.6 %Gibson County: 58 %Grant County: 59.6 %Greene County: 58.1 %Hamilton County: 59.6 %Hancock County: 59.2 %Harrison County: 59.1 %Hendricks County: 59.9 %Henry County: 60.2 %Howard County: 58 %Huntington County: 59.2 %Jackson County: 58.8 %Jasper County: 58.1 %Jay County: 55.9 %Jefferson County: 60.8 %Jennings County: 59.7 %Johnson County: 59.4 %Knox County: 59.3 %Kosciusko County: 59.2 %LaGrange County: 52.9 %Lake County: 59.8 %LaPorte County: 60.5 %Lawrence County: 58.1 %Madison County: 59.4 %Marion County: 63.2 %Marshall County: 56.8 %Martin County: 57.3 %Miami County: 61.3 %Monroe County: 69.2 %Montgomery County: 58.9 %Morgan County: 59.7 %Newton County: 58.5 %Noble County: 58.3 %Ohio County: 57.6 %Orange County: 57 %Owen County: 58.6 %Parke County: 57.5 %Perry County: 60.5 %Pike County: 57.3 %Porter County: 60.6 %Posey County: 58.3 %Pulaski County: 57.5 %Putnam County: 63.4 %Randolph County: 56.4 %Ripley County: 57.6 %Rush County: 58.6 %St. Joseph County: 60.8 %Scott County: 59.8 %Shelby County: 59.9 %Spencer County: 58.3 %Starke County: 58.3 %Steuben County: 59.9 %Sullivan County: 61.2 %Switzerland County: 57.5 %Tippecanoe County: 66.7 %Tipton County: 57.8 %Union County: 58 %Vanderburgh County: 60.8 %Vermillion County: 57.8 %Vigo County: 62.7 %Wabash County: 55.9 %Warren County: 56.9 %Warrick County: 57.5 %Washington County: 59.5 %Wayne County: 58 %Wells County: 57 %White County: 56.5 %Whitley County: 58.9 %
  • Under 57
  • 57 to 58
  • 58 to 59
  • 59 to 60
  • 60 and over
%, 2019. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2019

Monroe County: 69.2 %Monroe County69.2Tippecanoe County: 66.7 %Tippecanoe County66.7Putnam County: 63.4 %Putnam County63.4Marion County: 63.2 %Marion County63.2Delaware County: 62.7 %Delaware County62.7Vigo County: 62.7 %Vigo County62.7Miami County: 61.3 %Miami County61.3Sullivan County: 61.2 %Sullivan County61.2Clark County: 61 %Clark County61Vanderburgh County: 60.8 %Vanderburgh County60.8St. Joseph County: 60.8 %St. Joseph County60.8Jefferson County: 60.8 %Jefferson County60.8Porter County: 60.6 %Porter County60.6Perry County: 60.5 %Perry County60.5Floyd County: 60.5 %Floyd County60.5LaPorte County: 60.5 %LaPorte County60.5Henry County: 60.2 %Henry County60.2Hendricks County: 59.9 %Hendricks County59.9Shelby County: 59.9 %Shelby County59.9Steuben County: 59.9 %Steuben County59.9Scott County: 59.8 %Scott County59.8Lake County: 59.8 %Lake County59.8Jennings County: 59.7 %Jennings County59.7Morgan County: 59.7 %Morgan County59.7Grant County: 59.6 %Grant County59.6Hamilton County: 59.6 %Hamilton County59.6Dearborn County: 59.6 %Dearborn County59.6Bartholomew County: 59.5 %Bartholomew County59.5Washington County: 59.5 %Washington County59.5Johnson County: 59.4 %Johnson County59.4Madison County: 59.4 %Madison County59.4Allen County: 59.4 %Allen County59.4Knox County: 59.3 %Knox County59.3Huntington County: 59.2 %Huntington County59.2Hancock County: 59.2 %Hancock County59.2Kosciusko County: 59.2 %Kosciusko County59.2Harrison County: 59.1 %Harrison County59.1Boone County: 59.1 %Boone County59.1DeKalb County: 58.9 %DeKalb County58.9Whitley County: 58.9 %Whitley County58.9Monroe County: 69.2 %Monroe County69.2Tippecanoe County: 66.7 %Tippecanoe County66.7Putnam County: 63.4 %Putnam County63.4Marion County: 63.2 %Marion County63.2Delaware County: 62.7 %Delaware County62.7Vigo County: 62.7 %Vigo County62.7Miami County: 61.3 %Miami County61.3Sullivan County: 61.2 %Sullivan County61.2Clark County: 61 %Clark County61Vanderburgh County: 60.8 %Vanderburgh County60.8St. Joseph County: 60.8 %St. Joseph County60.8Jefferson County: 60.8 %Jefferson County60.8Porter County: 60.6 %Porter County60.6Perry County: 60.5 %Perry County60.5Floyd County: 60.5 %Floyd County60.5LaPorte County: 60.5 %LaPorte County60.5Henry County: 60.2 %Henry County60.2Hendricks County: 59.9 %Hendricks County59.9Shelby County: 59.9 %Shelby County59.9Steuben County: 59.9 %Steuben County59.9Scott County: 59.8 %Scott County59.8Lake County: 59.8 %Lake County59.8Jennings County: 59.7 %Jennings County59.7Morgan County: 59.7 %Morgan County59.7Grant County: 59.6 %Grant County59.6Hamilton County: 59.6 %Hamilton County59.6Dearborn County: 59.6 %Dearborn County59.6Bartholomew County: 59.5 %Bartholomew County59.5Washington County: 59.5 %Washington County59.5Johnson County: 59.4 %Johnson County59.4Madison County: 59.4 %Madison County59.4Allen County: 59.4 %Allen County59.4Knox County: 59.3 %Knox County59.3Huntington County: 59.2 %Huntington County59.2Hancock County: 59.2 %Hancock County59.2Kosciusko County: 59.2 %Kosciusko County59.2Harrison County: 59.1 %Harrison County59.1Boone County: 59.1 %Boone County59.1DeKalb County: 58.9 %DeKalb County58.9Whitley County: 58.9 %Whitley County58.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2019 (%)Change on 2018
1Monroe County69.2-0.6 pts
2Tippecanoe County66.7-0.4 pts
3Putnam County63.40 pts
4Marion County63.2-0.2 pts
5Delaware County62.7-0.3 pts
6Vigo County62.7-0.4 pts
7Miami County61.3-0.3 pts
8Sullivan County61.2-0.3 pts
9Clark County61-0.3 pts
10Vanderburgh County60.8-0.5 pts
11St. Joseph County60.8-0.2 pts
12Jefferson County60.8-0.3 pts
13Porter County60.6-0.3 pts
14Perry County60.5-0.1 pts
15Floyd County60.5-0.4 pts
15LaPorte County60.5-0.3 pts
17Henry County60.2-0.3 pts
18Hendricks County59.9-0.2 pts
19Shelby County59.9-0.2 pts
20Steuben County59.9-0.4 pts
21Scott County59.8-0.3 pts
22Lake County59.8-0.3 pts
23Jennings County59.7-0.5 pts
24Morgan County59.7-0.3 pts
25Grant County59.6-0.3 pts
26Hamilton County59.6-0.2 pts
27Dearborn County59.6-0.2 pts
28Bartholomew County59.5-0.3 pts
29Washington County59.5-0.6 pts
30Johnson County59.4-0.3 pts
31Madison County59.4-0.2 pts
32Allen County59.4-0.3 pts
33Knox County59.3-0.3 pts
34Huntington County59.2-0.6 pts
35Hancock County59.2-0.2 pts
36Kosciusko County59.2-0.2 pts
37Harrison County59.1-0.4 pts
38Boone County59.1-0.2 pts
39DeKalb County58.9-0.3 pts
40Whitley County58.9-0.1 pts
41Montgomery County58.9-0.2 pts
42Jackson County58.8-0.1 pts
43Clay County58.7-0.2 pts
44Rush County58.6-0.4 pts
45Owen County58.6-0.4 pts
46Decatur County58.6-0.1 pts
47Newton County58.5-0.4 pts
48Dubois County58.4-0.3 pts
49Spencer County58.3-0.1 pts
50Noble County58.3-0.4 pts
51Posey County58.3-0.5 pts
52Starke County58.3-0.1 pts
53Greene County58.1-0.1 pts
54Lawrence County58.1-0.2 pts
55Jasper County58.1-0.5 pts
56Gibson County58-0.4 pts
57Wayne County58-0.4 pts
58Crawford County58-0.8 pts
59Union County58-1 pts
60Howard County58-0.4 pts
61Vermillion County57.8-0.4 pts
62Elkhart County57.8-0.2 pts
63Tipton County57.8-0.3 pts
64Franklin County57.7-0.4 pts
65Ripley County57.6-0.3 pts
66Ohio County57.6-1 pts
67Cass County57.6-0.1 pts
68Fountain County57.6-0.2 pts
69Switzerland County57.5-0.2 pts
70Warrick County57.5-0 pts
71Pulaski County57.5-0.3 pts
72Parke County57.5-0.4 pts
73Carroll County57.4-0.2 pts
74Fayette County57.4-0.2 pts
75Martin County57.3-0.3 pts
76Pike County57.3-0.4 pts
77Clinton County57.2-0.1 pts
78Brown County57.1-0.5 pts
79Orange County57-0.3 pts
80Wells County57-0.2 pts
81Warren County56.9-0.3 pts
82Blackford County56.9-0.1 pts
83Marshall County56.8-0.3 pts
84Fulton County56.6-0.4 pts
85Benton County56.5-0.5 pts
86White County56.5-0.1 pts
87Randolph County56.4-0.2 pts
88Wabash County55.9-0.5 pts
89Jay County55.9-0.4 pts
90Daviess County55-0.2 pts
91LaGrange County52.9-0.2 pts
92Adams County52.8-0.4 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, 2019) [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, 2019. 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=2019. 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, 2019. 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=2019.

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, 2019 [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=2019 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_indiana_by_2019,
  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, 2019}},
  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=2019. 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, 2019
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=2019
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/indiana-counties?period=2019.
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  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Indiana by population aged 18 to 64 using official data, and cite the source.
rank_places {"indicator":"population_18_64_share","level":"province","within":"Indiana","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_18_64_share&level=province&within=Indiana&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest population aged 18 to 64?

Monroe County, with 69.2% in 2019, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Adams County, with 52.8% in 2019.

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