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

Counties in Utah by population aged 18 to 64

Summit County had the highest population aged 18 to 64 of 29 counties in 2015, at 63%. Piute County had the lowest, at 50.2%. The median was 55.6% and the figure for Utah was 59%. Source: the U.S. Census Bureau.

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Highest63Summit County
Lowest50.2Piute County
Median55.629 counties
Utah59History

Map of counties, 2015

Beaver County: 54.8 %Box Elder County: 54.7 %Cache County: 60.4 %Carbon County: 57.3 %Daggett County: 55.6 %Davis County: 57.1 %Duchesne County: 54.6 %Emery County: 53.8 %Garfield County: 54.5 %Grand County: 61.6 %Iron County: 58.6 %Juab County: 52.6 %Kane County: 54 %Millard County: 52.3 %Morgan County: 52.8 %Piute County: 50.2 %Rich County: 52.7 %Salt Lake County: 62 %San Juan County: 55.6 %Sanpete County: 57.3 %Sevier County: 53.3 %Summit County: 63 %Tooele County: 56.4 %Uintah County: 56.3 %Utah County: 57.8 %Wasatch County: 57 %Washington County: 51.7 %Wayne County: 54.1 %Weber County: 59.6 %
  • Under 53
  • 53 to 55
  • 55 to 56
  • 56 to 58
  • 58 and over
%, 2015. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2015

Summit County: 63 %Summit County63Salt Lake County: 62 %Salt Lake County62Grand County: 61.6 %Grand County61.6Cache County: 60.4 %Cache County60.4Weber County: 59.6 %Weber County59.6Iron County: 58.6 %Iron County58.6Utah County: 57.8 %Utah County57.8Carbon County: 57.3 %Carbon County57.3Sanpete County: 57.3 %Sanpete County57.3Davis County: 57.1 %Davis County57.1Wasatch County: 57 %Wasatch County57Tooele County: 56.4 %Tooele County56.4Uintah County: 56.3 %Uintah County56.3San Juan County: 55.6 %San Juan County55.6Daggett County: 55.6 %Daggett County55.6Beaver County: 54.8 %Beaver County54.8Box Elder County: 54.7 %Box Elder County54.7Duchesne County: 54.6 %Duchesne County54.6Garfield County: 54.5 %Garfield County54.5Wayne County: 54.1 %Wayne County54.1Kane County: 54 %Kane County54Emery County: 53.8 %Emery County53.8Sevier County: 53.3 %Sevier County53.3Morgan County: 52.8 %Morgan County52.8Rich County: 52.7 %Rich County52.7Juab County: 52.6 %Juab County52.6Millard County: 52.3 %Millard County52.3Washington County: 51.7 %Washington County51.7Piute County: 50.2 %Piute County50.2Summit County: 63 %Summit County63Salt Lake County: 62 %Salt Lake County62Grand County: 61.6 %Grand County61.6Cache County: 60.4 %Cache County60.4Weber County: 59.6 %Weber County59.6Iron County: 58.6 %Iron County58.6Utah County: 57.8 %Utah County57.8Carbon County: 57.3 %Carbon County57.3Sanpete County: 57.3 %Sanpete County57.3Davis County: 57.1 %Davis County57.1Wasatch County: 57 %Wasatch County57Tooele County: 56.4 %Tooele County56.4Uintah County: 56.3 %Uintah County56.3San Juan County: 55.6 %San Juan County55.6Daggett County: 55.6 %Daggett County55.6Beaver County: 54.8 %Beaver County54.8Box Elder County: 54.7 %Box Elder County54.7Duchesne County: 54.6 %Duchesne County54.6Garfield County: 54.5 %Garfield County54.5Wayne County: 54.1 %Wayne County54.1Kane County: 54 %Kane County54Emery County: 53.8 %Emery County53.8Sevier County: 53.3 %Sevier County53.3Morgan County: 52.8 %Morgan County52.8Rich County: 52.7 %Rich County52.7Juab County: 52.6 %Juab County52.6Millard County: 52.3 %Millard County52.3Washington County: 51.7 %Washington County51.7Piute County: 50.2 %Piute County50.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2015 (%)Change on 2014
1Summit County63-0.4 pts
2Salt Lake County62-0.1 pts
3Grand County61.6-0.2 pts
4Cache County60.4-0 pts
5Weber County59.6+0.1 pts
6Iron County58.6-0.5 pts
7Utah County57.8+0.1 pts
8Carbon County57.3-0.5 pts
9Sanpete County57.3-0.3 pts
10Davis County57.1-0 pts
11Wasatch County57-0.1 pts
12Tooele County56.4+0.1 pts
13Uintah County56.3-0.3 pts
14San Juan County55.6+0.3 pts
15Daggett County55.6-0.9 pts
16Beaver County54.8-0 pts
17Box Elder County54.70 pts
18Duchesne County54.6-0.5 pts
19Garfield County54.5-0.6 pts
20Wayne County54.1-0 pts
21Kane County54-0.6 pts
22Emery County53.8-0 pts
23Sevier County53.3-0.1 pts
24Morgan County52.8+0.1 pts
25Rich County52.7+0.2 pts
26Juab County52.6-0.3 pts
27Millard County52.3-0.5 pts
28Washington County51.7-0.1 pts
29Piute County50.2-0 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 Utah 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 Utah 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/utah-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 Utah 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/utah-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 Utah 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/utah-counties?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_utah_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 Utah 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/utah-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 Utah 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/utah-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/utah-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?

Summit County, with 63% in 2015, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Piute County, with 50.2% 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 Utah: more rankings