US states by population aged 18 to 64

District of Columbia had the highest population aged 18 to 64 of 51 states in 2021, at 69%. South Dakota had the lowest, at 57.5%. The median was 59.9% and the figure for the United States was 60.7%. Source: the U.S. Census Bureau.

Highest69District of Columbia

Lowest57.5South Dakota

Median59.951 states

United States60.7History

All states, 2021

%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

Rank	States	2021 (%)	Change on 2020
1	District of Columbia	69	-0.2 pts
2	Colorado	62.9	-0.1 pts
3	Massachusetts	62.7	-0.1 pts
4	Rhode Island	62.3	-0.2 pts
5	New York	62.2	-0.4 pts
6	California	62.2	-0.3 pts
7	Alaska	62	-0.3 pts
8	New Jersey	61.7	-0.2 pts
9	Georgia	61.7	-0.2 pts
10	Maryland	61.6	-0.2 pts
11	Virginia	61.6	-0.2 pts
12	Washington	61.5	-0.3 pts
13	New Hampshire	61.5	-0.4 pts
14	Connecticut	61.4	-0 pts
15	Illinois	61.4	-0.2 pts
16	Texas	61.3	0 pts
17	Nevada	61.1	-0.1 pts
18	North Carolina	60.6	-0.1 pts
19	Vermont	60.6	-0.3 pts
20	Tennessee	60.5	-0.2 pts
21	Oregon	60.5	-0.2 pts
22	North Dakota	60.2	-0.3 pts
23	Michigan	60.2	-0.3 pts
23	Pennsylvania	60.2	-0.2 pts
25	Alabama	60.1	-0.2 pts
26	Kentucky	59.9	-0.3 pts
27	Minnesota	59.9	-0.3 pts
28	Indiana	59.8	-0.1 pts
29	Wisconsin	59.8	-0.4 pts
30	Louisiana	59.7	-0.3 pts
31	Missouri	59.7	-0.2 pts
32	Utah	59.7	+0.3 pts
33	Ohio	59.6	-0.3 pts
34	Maine	59.3	-0.2 pts
35	Oklahoma	59.3	-0.1 pts
36	Mississippi	59.2	-0.2 pts
37	Hawaii	59.2	-0.4 pts
38	South Carolina	59	-0.2 pts
39	West Virginia	59	-0.3 pts
40	Delaware	59	-0.2 pts
41	Arkansas	59	-0.1 pts
42	Kansas	58.9	-0.2 pts
43	Florida	58.8	-0.2 pts
44	New Mexico	58.7	-0.1 pts
45	Nebraska	58.6	-0.2 pts
46	Iowa	58.6	-0.1 pts
47	Arizona	58.5	-0.1 pts
48	Wyoming	58.5	-0.3 pts
49	Montana	58.4	-0.1 pts
50	Idaho	58.1	+0.1 pts
51	South Dakota	57.5	-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 states 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 (US states 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, US states 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/us-states?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. US states 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/us-states?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, US states 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/us-states?period=2021 (Accessed: 12 October 2026).

BibTeX

@misc{census_us_states_by_population_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: US states 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/us-states?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: US states 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/us-states?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/us-states?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  -

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.

Embed code

<iframe src="https://invokely.ai/embed/rankings/population-18-64/us-states?period=2021" width="760" height="500" title="US states by population aged 18 to 64, 2021, chart from Invokely" loading="lazy" style="border:0;width:100%;max-width:760px" referrerpolicy="strict-origin-when-cross-origin"></iframe>

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 US states by population aged 18 to 64 using official data, and cite the source.

rank_places {"indicator":"population_18_64_share","level":"region","within":"United States","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_18_64_share&level=region&within=United%20States&limit=10

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

Questions

Which state has the highest population aged 18 to 64?

District of Columbia, with 69% in 2021, according to the U.S. Census Bureau.

Which state has the lowest population aged 18 to 64?

South Dakota, with 57.5% 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.