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 2024, at 65.4%. Keweenaw County had the lowest, at 47.3%. The median was 56.4% and the figure for Michigan was 59.4%. Source: the U.S. Census Bureau.

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Highest65.4Washtenaw County
Lowest47.3Keweenaw County
Median56.483 counties
Michigan59.4History

Map of counties, 2024

Alcona County: 50.1 %Alger County: 56.5 %Allegan County: 57.4 %Alpena County: 54.3 %Antrim County: 53.4 %Arenac County: 52.9 %Baraga County: 57.3 %Barry County: 57.5 %Bay County: 57.4 %Benzie County: 53.2 %Berrien County: 56 %Branch County: 55.9 %Calhoun County: 58 %Cass County: 56.5 %Charlevoix County: 53.4 %Cheboygan County: 54.1 %Chippewa County: 60.9 %Clare County: 53.7 %Clinton County: 58.8 %Crawford County: 53.6 %Delta County: 54.1 %Dickinson County: 54.6 %Eaton County: 57.9 %Emmet County: 55.2 %Genesee County: 58.5 %Gladwin County: 52.7 %Gogebic County: 53.3 %Grand Traverse County: 56.8 %Gratiot County: 64.5 %Hillsdale County: 55.5 %Houghton County: 61.2 %Huron County: 52.6 %Ingham County: 64.7 %Ionia County: 61.5 %Iosco County: 50.6 %Iron County: 50.5 %Isabella County: 64.6 %Jackson County: 58.8 %Kalamazoo County: 61 %Kalkaska County: 56.8 %Kent County: 60.9 %Keweenaw County: 47.3 %Lake County: 57.1 %Lapeer County: 58.4 %Leelanau County: 48.8 %Lenawee County: 57.4 %Livingston County: 58.6 %Luce County: 60.8 %Mackinac County: 52.9 %Macomb County: 60.4 %Manistee County: 54.4 %Marquette County: 60.6 %Mason County: 53.6 %Mecosta County: 59 %Menominee County: 54.2 %Midland County: 57.2 %Missaukee County: 54.8 %Monroe County: 58.7 %Montcalm County: 60.3 %Montmorency County: 50.5 %Muskegon County: 58.2 %Newaygo County: 56.2 %Oakland County: 60.5 %Oceana County: 54.8 %Ogemaw County: 52.8 %Ontonagon County: 49.4 %Osceola County: 54.5 %Oscoda County: 48.8 %Otsego County: 56.4 %Ottawa County: 59.8 %Presque Isle County: 49.2 %Roscommon County: 50.7 %Saginaw County: 58 %St. Clair County: 58.3 %St. Joseph County: 56 %Sanilac County: 55 %Schoolcraft County: 51.5 %Shiawassee County: 57.9 %Tuscola County: 56.6 %Van Buren County: 55.9 %Washtenaw County: 65.4 %Wayne County: 59.8 %Wexford County: 55.5 %
  • Under 53
  • 53 to 54
  • 54 to 56
  • 56 to 58
  • 58 to 60
  • 60 and over
%, 2024. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2024

Washtenaw County: 65.4 %Washtenaw County65.4Ingham County: 64.7 %Ingham County64.7Isabella County: 64.6 %Isabella County64.6Gratiot County: 64.5 %Gratiot County64.5Ionia County: 61.5 %Ionia County61.5Houghton County: 61.2 %Houghton County61.2Kalamazoo County: 61 %Kalamazoo County61Kent County: 60.9 %Kent County60.9Chippewa County: 60.9 %Chippewa County60.9Luce County: 60.8 %Luce County60.8Marquette County: 60.6 %Marquette County60.6Oakland County: 60.5 %Oakland County60.5Macomb County: 60.4 %Macomb County60.4Montcalm County: 60.3 %Montcalm County60.3Wayne County: 59.8 %Wayne County59.8Ottawa County: 59.8 %Ottawa County59.8Mecosta County: 59 %Mecosta County59Jackson County: 58.8 %Jackson County58.8Clinton County: 58.8 %Clinton County58.8Monroe County: 58.7 %Monroe County58.7Livingston County: 58.6 %Livingston County58.6Genesee County: 58.5 %Genesee County58.5Lapeer County: 58.4 %Lapeer County58.4St. Clair County: 58.3 %St. Clair County58.3Muskegon County: 58.2 %Muskegon County58.2Saginaw County: 58 %Saginaw County58Calhoun County: 58 %Calhoun County58Shiawassee County: 57.9 %Shiawassee County57.9Eaton County: 57.9 %Eaton County57.9Barry County: 57.5 %Barry County57.5Allegan County: 57.4 %Allegan County57.4Lenawee County: 57.4 %Lenawee County57.4Bay County: 57.4 %Bay County57.4Baraga County: 57.3 %Baraga County57.3Midland County: 57.2 %Midland County57.2Lake County: 57.1 %Lake County57.1Grand Traverse County: 56.8 %Grand Traverse County56.8Kalkaska County: 56.8 %Kalkaska County56.8Tuscola County: 56.6 %Tuscola County56.6Cass County: 56.5 %Cass County56.5Washtenaw County: 65.4 %Washtenaw County65.4Ingham County: 64.7 %Ingham County64.7Isabella County: 64.6 %Isabella County64.6Gratiot County: 64.5 %Gratiot County64.5Ionia County: 61.5 %Ionia County61.5Houghton County: 61.2 %Houghton County61.2Kalamazoo County: 61 %Kalamazoo County61Kent County: 60.9 %Kent County60.9Chippewa County: 60.9 %Chippewa County60.9Luce County: 60.8 %Luce County60.8Marquette County: 60.6 %Marquette County60.6Oakland County: 60.5 %Oakland County60.5Macomb County: 60.4 %Macomb County60.4Montcalm County: 60.3 %Montcalm County60.3Wayne County: 59.8 %Wayne County59.8Ottawa County: 59.8 %Ottawa County59.8Mecosta County: 59 %Mecosta County59Jackson County: 58.8 %Jackson County58.8Clinton County: 58.8 %Clinton County58.8Monroe County: 58.7 %Monroe County58.7Livingston County: 58.6 %Livingston County58.6Genesee County: 58.5 %Genesee County58.5Lapeer County: 58.4 %Lapeer County58.4St. Clair County: 58.3 %St. Clair County58.3Muskegon County: 58.2 %Muskegon County58.2Saginaw County: 58 %Saginaw County58Calhoun County: 58 %Calhoun County58Shiawassee County: 57.9 %Shiawassee County57.9Eaton County: 57.9 %Eaton County57.9Barry County: 57.5 %Barry County57.5Allegan County: 57.4 %Allegan County57.4Lenawee County: 57.4 %Lenawee County57.4Bay County: 57.4 %Bay County57.4Baraga County: 57.3 %Baraga County57.3Midland County: 57.2 %Midland County57.2Lake County: 57.1 %Lake County57.1Grand Traverse County: 56.8 %Grand Traverse County56.8Kalkaska County: 56.8 %Kalkaska County56.8Tuscola County: 56.6 %Tuscola County56.6Cass County: 56.5 %Cass County56.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Washtenaw County65.4-0.2 pts
2Ingham County64.7-0.1 pts
3Isabella County64.6-0.1 pts
4Gratiot County64.5+0.7 pts
5Ionia County61.5-0.3 pts
6Houghton County61.2-0.2 pts
7Kalamazoo County61-0 pts
8Kent County60.9-0.2 pts
9Chippewa County60.9-0.1 pts
10Luce County60.8-0.2 pts
11Marquette County60.6-0.2 pts
12Oakland County60.5-0.2 pts
13Macomb County60.4-0.3 pts
14Montcalm County60.3-0.2 pts
15Wayne County59.8-0.2 pts
16Ottawa County59.8-0.1 pts
17Mecosta County59-0.4 pts
18Jackson County58.8-0.3 pts
19Clinton County58.8-0.2 pts
20Monroe County58.7-0.3 pts
21Livingston County58.6-0.5 pts
22Genesee County58.5-0.2 pts
23Lapeer County58.4-0.4 pts
24St. Clair County58.3-0.5 pts
25Muskegon County58.2-0.1 pts
26Saginaw County580 pts
27Calhoun County58-0 pts
28Shiawassee County57.9-0.2 pts
29Eaton County57.9-0.2 pts
30Barry County57.5-0.3 pts
31Allegan County57.4-0.2 pts
32Lenawee County57.4-0.2 pts
33Bay County57.4-0.4 pts
34Baraga County57.3-0.5 pts
35Midland County57.2-0.4 pts
36Lake County57.1-0.7 pts
37Grand Traverse County56.8-0.6 pts
38Kalkaska County56.8-0.3 pts
39Tuscola County56.6-0.3 pts
40Cass County56.5-0.3 pts
41Alger County56.5-0.8 pts
42Otsego County56.40 pts
43Newaygo County56.2-0.4 pts
44Berrien County56-0.3 pts
45St. Joseph County56-0.4 pts
46Van Buren County55.9-0.3 pts
47Branch County55.9-0.1 pts
48Wexford County55.5-0.2 pts
49Hillsdale County55.5-0.4 pts
50Emmet County55.2-0.5 pts
51Sanilac County55-0.4 pts
52Oceana County54.8-0.6 pts
53Missaukee County54.8-0.2 pts
54Dickinson County54.6-0.4 pts
55Osceola County54.5-0.2 pts
56Manistee County54.4-0.4 pts
57Alpena County54.3-0.6 pts
58Menominee County54.2-0.3 pts
59Cheboygan County54.1-0.5 pts
60Delta County54.1-0.5 pts
61Clare County53.7-0.6 pts
62Mason County53.6-0.4 pts
63Crawford County53.6-1 pts
64Antrim County53.4-0.6 pts
65Charlevoix County53.4-0.7 pts
66Gogebic County53.3-0.5 pts
67Benzie County53.2-0.5 pts
68Mackinac County52.90 pts
69Arenac County52.9-0.6 pts
70Ogemaw County52.8-0.6 pts
71Gladwin County52.7-0.4 pts
72Huron County52.6-0.7 pts
73Schoolcraft County51.5-0.5 pts
74Roscommon County50.7-0.9 pts
75Iosco County50.6-0.7 pts
76Montmorency County50.5-0.6 pts
77Iron County50.5-0.7 pts
78Alcona County50.1-0.4 pts
79Ontonagon County49.4-0.2 pts
80Presque Isle County49.2-0.7 pts
81Oscoda County48.8-1.1 pts
82Leelanau County48.8-0.8 pts
83Keweenaw County47.3-1.3 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, 2024) [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, 2024. 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=2024. 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, 2024. 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=2024.

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, 2024 [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=2024 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_michigan_by_2024,
  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, 2024}},
  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=2024. 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, 2024
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=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/michigan-counties?period=2024.
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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Rank Counties in Michigan by population aged 18 to 64 using official data, and cite the source.
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Questions

Which county has the highest population aged 18 to 64?

Washtenaw County, with 65.4% in 2024, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Keweenaw County, with 47.3% in 2024.

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