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

Counties in Michigan by population aged 18 to 64

Washtenaw County had the highest population aged 18 to 64 of 83 counties in 2021, at 66%. Keweenaw County had the lowest, at 48.6%. The median was 57.3% and the figure for Michigan was 60.2%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest66Washtenaw County
Lowest48.6Keweenaw County
Median57.383 counties
Michigan60.2History

Map of counties, 2021

Alcona County: 51.2 %Alger County: 57.8 %Allegan County: 58.3 %Alpena County: 56.1 %Antrim County: 54.6 %Arenac County: 54.8 %Baraga County: 58.5 %Barry County: 58.3 %Bay County: 58.7 %Benzie County: 54.8 %Berrien County: 57.1 %Branch County: 56.8 %Calhoun County: 58.4 %Cass County: 57.2 %Charlevoix County: 55.4 %Cheboygan County: 55.1 %Chippewa County: 61.2 %Clare County: 55.3 %Clinton County: 59.4 %Crawford County: 55.6 %Delta County: 55.2 %Dickinson County: 56.3 %Eaton County: 59 %Emmet County: 56.6 %Genesee County: 59.3 %Gladwin County: 53.8 %Gogebic County: 55.1 %Grand Traverse County: 58.4 %Gratiot County: 61.8 %Hillsdale County: 57 %Houghton County: 61.7 %Huron County: 54.5 %Ingham County: 63.5 %Ionia County: 62.7 %Iosco County: 52.6 %Iron County: 52.6 %Isabella County: 65.6 %Jackson County: 59.8 %Kalamazoo County: 61.3 %Kalkaska County: 57.5 %Kent County: 61.6 %Keweenaw County: 48.6 %Lake County: 57.6 %Lapeer County: 59.7 %Leelanau County: 50.8 %Lenawee County: 58.8 %Livingston County: 60.1 %Luce County: 58.7 %Mackinac County: 53.9 %Macomb County: 61.4 %Manistee County: 56.1 %Marquette County: 60.9 %Mason County: 54.3 %Mecosta County: 59.9 %Menominee County: 55.8 %Midland County: 58.4 %Missaukee County: 55.7 %Monroe County: 59.8 %Montcalm County: 60.8 %Montmorency County: 51.1 %Muskegon County: 58.8 %Newaygo County: 57.3 %Oakland County: 61.5 %Oceana County: 56 %Ogemaw County: 54.4 %Ontonagon County: 51.6 %Osceola County: 55.3 %Oscoda County: 51.1 %Otsego County: 57.3 %Ottawa County: 60.1 %Presque Isle County: 51.3 %Roscommon County: 52.2 %Saginaw County: 58.1 %St. Clair County: 59.5 %St. Joseph County: 56.7 %Sanilac County: 56.2 %Schoolcraft County: 53.7 %Shiawassee County: 59.1 %Tuscola County: 57.5 %Van Buren County: 57.3 %Washtenaw County: 66 %Wayne County: 60.7 %Wexford County: 56.4 %
  • Under 54
  • 54 to 56
  • 56 to 57
  • 57 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

Washtenaw County: 66 %Washtenaw County66Isabella County: 65.6 %Isabella County65.6Ingham County: 63.5 %Ingham County63.5Ionia County: 62.7 %Ionia County62.7Gratiot County: 61.8 %Gratiot County61.8Houghton County: 61.7 %Houghton County61.7Kent County: 61.6 %Kent County61.6Oakland County: 61.5 %Oakland County61.5Macomb County: 61.4 %Macomb County61.4Kalamazoo County: 61.3 %Kalamazoo County61.3Chippewa County: 61.2 %Chippewa County61.2Marquette County: 60.9 %Marquette County60.9Montcalm County: 60.8 %Montcalm County60.8Wayne County: 60.7 %Wayne County60.7Livingston County: 60.1 %Livingston County60.1Ottawa County: 60.1 %Ottawa County60.1Mecosta County: 59.9 %Mecosta County59.9Jackson County: 59.8 %Jackson County59.8Monroe County: 59.8 %Monroe County59.8Lapeer County: 59.7 %Lapeer County59.7St. Clair County: 59.5 %St. Clair County59.5Clinton County: 59.4 %Clinton County59.4Genesee County: 59.3 %Genesee County59.3Shiawassee County: 59.1 %Shiawassee County59.1Eaton County: 59 %Eaton County59Lenawee County: 58.8 %Lenawee County58.8Muskegon County: 58.8 %Muskegon County58.8Bay County: 58.7 %Bay County58.7Luce County: 58.7 %Luce County58.7Baraga County: 58.5 %Baraga County58.5Midland County: 58.4 %Midland County58.4Calhoun County: 58.4 %Calhoun County58.4Grand Traverse County: 58.4 %Grand Traverse County58.4Allegan County: 58.3 %Allegan County58.3Barry County: 58.3 %Barry County58.3Saginaw County: 58.1 %Saginaw County58.1Alger County: 57.8 %Alger County57.8Lake County: 57.6 %Lake County57.6Kalkaska County: 57.5 %Kalkaska County57.5Tuscola County: 57.5 %Tuscola County57.5Washtenaw County: 66 %Washtenaw County66Isabella County: 65.6 %Isabella County65.6Ingham County: 63.5 %Ingham County63.5Ionia County: 62.7 %Ionia County62.7Gratiot County: 61.8 %Gratiot County61.8Houghton County: 61.7 %Houghton County61.7Kent County: 61.6 %Kent County61.6Oakland County: 61.5 %Oakland County61.5Macomb County: 61.4 %Macomb County61.4Kalamazoo County: 61.3 %Kalamazoo County61.3Chippewa County: 61.2 %Chippewa County61.2Marquette County: 60.9 %Marquette County60.9Montcalm County: 60.8 %Montcalm County60.8Wayne County: 60.7 %Wayne County60.7Livingston County: 60.1 %Livingston County60.1Ottawa County: 60.1 %Ottawa County60.1Mecosta County: 59.9 %Mecosta County59.9Jackson County: 59.8 %Jackson County59.8Monroe County: 59.8 %Monroe County59.8Lapeer County: 59.7 %Lapeer County59.7St. Clair County: 59.5 %St. Clair County59.5Clinton County: 59.4 %Clinton County59.4Genesee County: 59.3 %Genesee County59.3Shiawassee County: 59.1 %Shiawassee County59.1Eaton County: 59 %Eaton County59Lenawee County: 58.8 %Lenawee County58.8Muskegon County: 58.8 %Muskegon County58.8Bay County: 58.7 %Bay County58.7Luce County: 58.7 %Luce County58.7Baraga County: 58.5 %Baraga County58.5Midland County: 58.4 %Midland County58.4Calhoun County: 58.4 %Calhoun County58.4Grand Traverse County: 58.4 %Grand Traverse County58.4Allegan County: 58.3 %Allegan County58.3Barry County: 58.3 %Barry County58.3Saginaw County: 58.1 %Saginaw County58.1Alger County: 57.8 %Alger County57.8Lake County: 57.6 %Lake County57.6Kalkaska County: 57.5 %Kalkaska County57.5Tuscola County: 57.5 %Tuscola County57.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)Change on 2020
1Washtenaw County66-0.6 pts
2Isabella County65.6-0.4 pts
3Ingham County63.5-1.9 pts
4Ionia County62.7-0.3 pts
5Gratiot County61.8+1.4 pts
6Houghton County61.7-0.1 pts
7Kent County61.6-0.2 pts
8Oakland County61.5-0.2 pts
9Macomb County61.4-0.3 pts
10Kalamazoo County61.3-0.3 pts
11Chippewa County61.2-1 pts
12Marquette County60.9-0.5 pts
13Montcalm County60.8-0.1 pts
14Wayne County60.7-0.4 pts
15Livingston County60.1-0.4 pts
16Ottawa County60.1-0.3 pts
17Mecosta County59.9+0.1 pts
18Jackson County59.8-0.3 pts
19Monroe County59.8-0.4 pts
20Lapeer County59.7-0.3 pts
21St. Clair County59.5-0.3 pts
22Clinton County59.4-0.1 pts
23Genesee County59.3-0.2 pts
24Shiawassee County59.1-0.2 pts
25Eaton County59-0.2 pts
26Lenawee County58.8-0.1 pts
27Muskegon County58.8-0.2 pts
28Bay County58.7-0.1 pts
29Luce County58.7-2.8 pts
30Baraga County58.5-0.3 pts
31Midland County58.4-0.2 pts
32Calhoun County58.4-0.2 pts
33Grand Traverse County58.4-0.4 pts
34Allegan County58.3-0.2 pts
35Barry County58.3-0.1 pts
36Saginaw County58.1+0.1 pts
37Alger County57.8-0.9 pts
38Lake County57.6+0.1 pts
39Kalkaska County57.5-0.2 pts
40Tuscola County57.5-0.2 pts
41Otsego County57.30 pts
42Newaygo County57.3-0.1 pts
43Van Buren County57.3-0.4 pts
44Cass County57.2-0.3 pts
45Berrien County57.1-0.3 pts
46Hillsdale County57-0.3 pts
47Branch County56.8-0.3 pts
48St. Joseph County56.7-0.2 pts
49Emmet County56.6-0.4 pts
50Wexford County56.4-0.2 pts
51Dickinson County56.3-0.5 pts
52Sanilac County56.2-0.4 pts
53Manistee County56.1-0.2 pts
54Alpena County56.1-0.5 pts
55Oceana County56+0.1 pts
56Menominee County55.8-0.4 pts
57Missaukee County55.7-0.2 pts
58Crawford County55.60 pts
59Charlevoix County55.4-0.5 pts
60Clare County55.3-0.3 pts
61Osceola County55.3-0 pts
62Delta County55.2-0.2 pts
63Cheboygan County55.1+0.1 pts
64Gogebic County55.1-0.2 pts
65Benzie County54.8-0.4 pts
66Arenac County54.8-0.6 pts
67Antrim County54.6+0.1 pts
68Huron County54.5-0.3 pts
69Ogemaw County54.4-0.6 pts
70Mason County54.3-0.4 pts
71Mackinac County53.9+0.2 pts
72Gladwin County53.8+0.1 pts
73Schoolcraft County53.7-0.8 pts
74Iron County52.6-0.5 pts
75Iosco County52.6-0.1 pts
76Roscommon County52.2-0.3 pts
77Ontonagon County51.6+0.1 pts
78Presque Isle County51.3-0.3 pts
79Alcona County51.2+0.2 pts
80Oscoda County51.1-0.5 pts
81Montmorency County51.1-0.5 pts
82Leelanau County50.8-0.3 pts
83Keweenaw County48.6-0.3 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 Michigan 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 Michigan 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/michigan-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 Michigan 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/michigan-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 Michigan 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/michigan-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_michigan_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 Michigan 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/michigan-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 Michigan 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/michigan-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/michigan-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  -
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 Michigan by population aged 18 to 64 using official data, and cite the source.
rank_places {"indicator":"population_18_64_share","level":"province","within":"Michigan","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_18_64_share&level=province&within=Michigan&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?

Washtenaw County, with 66% in 2021, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Keweenaw County, with 48.6% 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 Michigan: more rankings