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 2015, at 71.4%. LaGrange County had the lowest, at 53.3%. The median was 59.8% and the figure for Indiana was 61.3%. Source: the U.S. Census Bureau.

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Highest71.4Monroe County
Lowest53.3LaGrange County
Median59.892 counties
Indiana61.3History

Map of counties, 2015

Adams County: 54 %Allen County: 60.3 %Bartholomew County: 60.8 %Benton County: 57.9 %Blackford County: 58 %Boone County: 59.8 %Brown County: 58.5 %Carroll County: 58.5 %Cass County: 58.6 %Clark County: 61.9 %Clay County: 60.2 %Clinton County: 57.9 %Crawford County: 59.7 %Daviess County: 56.1 %Dearborn County: 60.7 %Decatur County: 59.2 %DeKalb County: 60 %Delaware County: 63.8 %Dubois County: 59.8 %Elkhart County: 58.4 %Fayette County: 58.4 %Floyd County: 61.7 %Fountain County: 57.8 %Franklin County: 59.5 %Fulton County: 57.8 %Gibson County: 59.7 %Grant County: 61.1 %Greene County: 59.1 %Hamilton County: 60.3 %Hancock County: 60.1 %Harrison County: 60.7 %Hendricks County: 60.8 %Henry County: 60.9 %Howard County: 59.3 %Huntington County: 60.9 %Jackson County: 59.9 %Jasper County: 59 %Jay County: 57 %Jefferson County: 62.3 %Jennings County: 60.6 %Johnson County: 60.3 %Knox County: 61.4 %Kosciusko County: 60 %LaGrange County: 53.3 %Lake County: 60.6 %LaPorte County: 61.9 %Lawrence County: 59.2 %Madison County: 60.4 %Marion County: 63.8 %Marshall County: 58 %Martin County: 58.9 %Miami County: 62 %Monroe County: 71.4 %Montgomery County: 59.8 %Morgan County: 60.6 %Newton County: 59.9 %Noble County: 59.3 %Ohio County: 60.2 %Orange County: 58.2 %Owen County: 59.7 %Parke County: 59.6 %Perry County: 62.2 %Pike County: 58.8 %Porter County: 62 %Posey County: 60.3 %Pulaski County: 58.8 %Putnam County: 64.7 %Randolph County: 57.1 %Ripley County: 58.6 %Rush County: 59.4 %St. Joseph County: 61.6 %Scott County: 61.1 %Shelby County: 61 %Spencer County: 59.2 %Starke County: 59.9 %Steuben County: 61.4 %Sullivan County: 62.3 %Switzerland County: 58.1 %Tippecanoe County: 68.2 %Tipton County: 58.4 %Union County: 59.2 %Vanderburgh County: 62.3 %Vermillion County: 58.8 %Vigo County: 64.2 %Wabash County: 57.6 %Warren County: 58.4 %Warrick County: 58.6 %Washington County: 60.6 %Wayne County: 59.2 %Wells County: 58.2 %White County: 57.3 %Whitley County: 60.3 %
  • Under 58
  • 58 to 59
  • 59 to 60
  • 60 to 61
  • 61 to 62
  • 62 and over
%, 2015. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2015

Monroe County: 71.4 %Monroe County71.4Tippecanoe County: 68.2 %Tippecanoe County68.2Putnam County: 64.7 %Putnam County64.7Vigo County: 64.2 %Vigo County64.2Marion County: 63.8 %Marion County63.8Delaware County: 63.8 %Delaware County63.8Vanderburgh County: 62.3 %Vanderburgh County62.3Sullivan County: 62.3 %Sullivan County62.3Jefferson County: 62.3 %Jefferson County62.3Perry County: 62.2 %Perry County62.2Porter County: 62 %Porter County62Miami County: 62 %Miami County62Clark County: 61.9 %Clark County61.9LaPorte County: 61.9 %LaPorte County61.9Floyd County: 61.7 %Floyd County61.7St. Joseph County: 61.6 %St. Joseph County61.6Knox County: 61.4 %Knox County61.4Steuben County: 61.4 %Steuben County61.4Scott County: 61.1 %Scott County61.1Grant County: 61.1 %Grant County61.1Shelby County: 61 %Shelby County61Huntington County: 60.9 %Huntington County60.9Henry County: 60.9 %Henry County60.9Hendricks County: 60.8 %Hendricks County60.8Bartholomew County: 60.8 %Bartholomew County60.8Harrison County: 60.7 %Harrison County60.7Dearborn County: 60.7 %Dearborn County60.7Lake County: 60.6 %Lake County60.6Morgan County: 60.6 %Morgan County60.6Jennings County: 60.6 %Jennings County60.6Washington County: 60.6 %Washington County60.6Madison County: 60.4 %Madison County60.4Allen County: 60.3 %Allen County60.3Johnson County: 60.3 %Johnson County60.3Posey County: 60.3 %Posey County60.3Whitley County: 60.3 %Whitley County60.3Hamilton County: 60.3 %Hamilton County60.3Clay County: 60.2 %Clay County60.2Ohio County: 60.2 %Ohio County60.2Hancock County: 60.1 %Hancock County60.1Monroe County: 71.4 %Monroe County71.4Tippecanoe County: 68.2 %Tippecanoe County68.2Putnam County: 64.7 %Putnam County64.7Vigo County: 64.2 %Vigo County64.2Marion County: 63.8 %Marion County63.8Delaware County: 63.8 %Delaware County63.8Vanderburgh County: 62.3 %Vanderburgh County62.3Sullivan County: 62.3 %Sullivan County62.3Jefferson County: 62.3 %Jefferson County62.3Perry County: 62.2 %Perry County62.2Porter County: 62 %Porter County62Miami County: 62 %Miami County62Clark County: 61.9 %Clark County61.9LaPorte County: 61.9 %LaPorte County61.9Floyd County: 61.7 %Floyd County61.7St. Joseph County: 61.6 %St. Joseph County61.6Knox County: 61.4 %Knox County61.4Steuben County: 61.4 %Steuben County61.4Scott County: 61.1 %Scott County61.1Grant County: 61.1 %Grant County61.1Shelby County: 61 %Shelby County61Huntington County: 60.9 %Huntington County60.9Henry County: 60.9 %Henry County60.9Hendricks County: 60.8 %Hendricks County60.8Bartholomew County: 60.8 %Bartholomew County60.8Harrison County: 60.7 %Harrison County60.7Dearborn County: 60.7 %Dearborn County60.7Lake County: 60.6 %Lake County60.6Morgan County: 60.6 %Morgan County60.6Jennings County: 60.6 %Jennings County60.6Washington County: 60.6 %Washington County60.6Madison County: 60.4 %Madison County60.4Allen County: 60.3 %Allen County60.3Johnson County: 60.3 %Johnson County60.3Posey County: 60.3 %Posey County60.3Whitley County: 60.3 %Whitley County60.3Hamilton County: 60.3 %Hamilton County60.3Clay County: 60.2 %Clay County60.2Ohio County: 60.2 %Ohio County60.2Hancock County: 60.1 %Hancock County60.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2015 (%)Change on 2014
1Monroe County71.4-0.5 pts
2Tippecanoe County68.2-0.4 pts
3Putnam County64.7-0.3 pts
4Vigo County64.2-0.3 pts
5Marion County63.8-0.2 pts
6Delaware County63.8-0.3 pts
7Vanderburgh County62.3-0.4 pts
8Sullivan County62.3-0.3 pts
9Jefferson County62.3-0.2 pts
10Perry County62.2-0.6 pts
11Porter County62-0.4 pts
12Miami County62-0.6 pts
13Clark County61.9-0.4 pts
14LaPorte County61.9-0.3 pts
15Floyd County61.7-0.3 pts
16St. Joseph County61.6-0.1 pts
17Knox County61.4-0.3 pts
18Steuben County61.4-0.3 pts
19Scott County61.10 pts
20Grant County61.1-0.3 pts
21Shelby County61-0.3 pts
22Huntington County60.9-0.3 pts
23Henry County60.9-0.3 pts
24Hendricks County60.8-0.3 pts
25Bartholomew County60.8-0 pts
26Harrison County60.7-0.4 pts
27Dearborn County60.7-0.3 pts
28Lake County60.6-0.2 pts
29Morgan County60.6-0.4 pts
30Jennings County60.6-0.3 pts
31Washington County60.6-0.1 pts
32Madison County60.4-0.4 pts
33Allen County60.3-0.2 pts
34Johnson County60.3-0.1 pts
35Posey County60.3-0.4 pts
36Whitley County60.3-0.3 pts
37Hamilton County60.3-0.2 pts
38Clay County60.2-0.1 pts
39Ohio County60.2-0 pts
40Hancock County60.1-0.2 pts
41Kosciusko County60-0.2 pts
42DeKalb County60-0.1 pts
43Starke County59.9-0.3 pts
44Newton County59.9-0.3 pts
45Jackson County59.9-0.5 pts
46Montgomery County59.8-0.1 pts
47Dubois County59.8-0.2 pts
48Boone County59.8-0.1 pts
49Crawford County59.7-0.6 pts
50Owen County59.7-0.7 pts
51Gibson County59.7-0.5 pts
52Parke County59.6-1 pts
53Franklin County59.5-0.1 pts
54Rush County59.4-0.1 pts
55Noble County59.3-0.3 pts
56Howard County59.3-0.1 pts
57Decatur County59.2-0.1 pts
58Wayne County59.2-0.4 pts
59Lawrence County59.2-0.3 pts
60Spencer County59.2-0.3 pts
61Union County59.2-0.2 pts
62Greene County59.1-0.4 pts
63Jasper County59-0.2 pts
64Martin County58.9-0.3 pts
65Pike County58.8-0.1 pts
66Pulaski County58.8-0.3 pts
67Vermillion County58.8-0.4 pts
68Warrick County58.6-0.4 pts
69Cass County58.6-0.3 pts
70Ripley County58.6-0.2 pts
71Brown County58.5-0.8 pts
72Carroll County58.5-0.1 pts
73Elkhart County58.4-0.3 pts
74Warren County58.4-0.2 pts
75Fayette County58.4-0.5 pts
76Tipton County58.4-0.6 pts
77Orange County58.2-0.1 pts
78Wells County58.2-0.6 pts
79Switzerland County58.1-0.4 pts
80Marshall County58-0.3 pts
81Blackford County58-0.3 pts
82Clinton County57.9-0.2 pts
83Benton County57.9-0.1 pts
84Fountain County57.8-0 pts
85Fulton County57.8-0.4 pts
86Wabash County57.6-0.4 pts
87White County57.3-0.4 pts
88Randolph County57.1-0.3 pts
89Jay County57-0.3 pts
90Daviess County56.1-0.3 pts
91Adams County54-0.2 pts
92LaGrange County53.3-0.1 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, 2015) [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, 2015. 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=2015. 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, 2015. 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=2015.

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, 2015 [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=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_indiana_by_2015,
  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, 2015}},
  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=2015. 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, 2015
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=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/indiana-counties?period=2015.
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 71.4% in 2015, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

LaGrange County, with 53.3% in 2015.

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