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

Counties in Michigan by population aged 18 to 64

Isabella County had the highest population aged 18 to 64 of 83 counties in 2018, at 67.8%. Keweenaw County had the lowest, at 50.1%. The median was 58.3% and the figure for Michigan was 61.2%. Source: the U.S. Census Bureau.

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Highest67.8Isabella County
Lowest50.1Keweenaw County
Median58.383 counties
Michigan61.2History

Map of counties, 2018

Alcona County: 51.4 %Alger County: 59.5 %Allegan County: 59.2 %Alpena County: 57.8 %Antrim County: 55.1 %Arenac County: 57.2 %Baraga County: 59.6 %Barry County: 58.9 %Bay County: 59.5 %Benzie County: 55.9 %Berrien County: 58.2 %Branch County: 57.8 %Calhoun County: 59.3 %Cass County: 58.3 %Charlevoix County: 56.5 %Cheboygan County: 55.5 %Chippewa County: 63.4 %Clare County: 56.6 %Clinton County: 60.3 %Crawford County: 56.5 %Delta County: 56.5 %Dickinson County: 57.9 %Eaton County: 60.1 %Emmet County: 57.9 %Genesee County: 60.2 %Gladwin County: 54.5 %Gogebic County: 59.1 %Grand Traverse County: 59.8 %Gratiot County: 60.7 %Hillsdale County: 58.2 %Houghton County: 62.7 %Huron County: 55.9 %Ingham County: 66.1 %Ionia County: 63.5 %Iosco County: 53.9 %Iron County: 53.8 %Isabella County: 67.8 %Jackson County: 60.9 %Kalamazoo County: 62.5 %Kalkaska County: 58.4 %Kent County: 62.3 %Keweenaw County: 50.1 %Lake County: 58.8 %Lapeer County: 60.8 %Leelanau County: 52.9 %Lenawee County: 59.7 %Livingston County: 61.2 %Luce County: 56.7 %Mackinac County: 55.6 %Macomb County: 62.3 %Manistee County: 57.4 %Marquette County: 62.2 %Mason County: 56.3 %Mecosta County: 60.5 %Menominee County: 57.5 %Midland County: 59.6 %Missaukee County: 56.2 %Monroe County: 60.8 %Montcalm County: 61.4 %Montmorency County: 52.8 %Muskegon County: 60 %Newaygo County: 58.1 %Oakland County: 62.3 %Oceana County: 56.5 %Ogemaw County: 55.8 %Ontonagon County: 52.1 %Osceola County: 56.1 %Oscoda County: 53.5 %Otsego County: 58.1 %Ottawa County: 60.9 %Presque Isle County: 52.6 %Roscommon County: 53.7 %Saginaw County: 58.9 %St. Clair County: 60.6 %St. Joseph County: 57.7 %Sanilac County: 57.5 %Schoolcraft County: 56.1 %Shiawassee County: 60.1 %Tuscola County: 58.4 %Van Buren County: 58.5 %Washtenaw County: 67.6 %Wayne County: 61.7 %Wexford County: 57.7 %
  • Under 56
  • 56 to 57
  • 57 to 58
  • 58 to 60
  • 60 to 61
  • 61 and over
%, 2018. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2018

Isabella County: 67.8 %Isabella County67.8Washtenaw County: 67.6 %Washtenaw County67.6Ingham County: 66.1 %Ingham County66.1Ionia County: 63.5 %Ionia County63.5Chippewa County: 63.4 %Chippewa County63.4Houghton County: 62.7 %Houghton County62.7Kalamazoo County: 62.5 %Kalamazoo County62.5Macomb County: 62.3 %Macomb County62.3Kent County: 62.3 %Kent County62.3Oakland County: 62.3 %Oakland County62.3Marquette County: 62.2 %Marquette County62.2Wayne County: 61.7 %Wayne County61.7Montcalm County: 61.4 %Montcalm County61.4Livingston County: 61.2 %Livingston County61.2Jackson County: 60.9 %Jackson County60.9Ottawa County: 60.9 %Ottawa County60.9Lapeer County: 60.8 %Lapeer County60.8Monroe County: 60.8 %Monroe County60.8Gratiot County: 60.7 %Gratiot County60.7St. Clair County: 60.6 %St. Clair County60.6Mecosta County: 60.5 %Mecosta County60.5Clinton County: 60.3 %Clinton County60.3Genesee County: 60.2 %Genesee County60.2Shiawassee County: 60.1 %Shiawassee County60.1Eaton County: 60.1 %Eaton County60.1Muskegon County: 60 %Muskegon County60Grand Traverse County: 59.8 %Grand Traverse County59.8Lenawee County: 59.7 %Lenawee County59.7Midland County: 59.6 %Midland County59.6Baraga County: 59.6 %Baraga County59.6Alger County: 59.5 %Alger County59.5Bay County: 59.5 %Bay County59.5Calhoun County: 59.3 %Calhoun County59.3Allegan County: 59.2 %Allegan County59.2Gogebic County: 59.1 %Gogebic County59.1Barry County: 58.9 %Barry County58.9Saginaw County: 58.9 %Saginaw County58.9Lake County: 58.8 %Lake County58.8Van Buren County: 58.5 %Van Buren County58.5Tuscola County: 58.4 %Tuscola County58.4Isabella County: 67.8 %Isabella County67.8Washtenaw County: 67.6 %Washtenaw County67.6Ingham County: 66.1 %Ingham County66.1Ionia County: 63.5 %Ionia County63.5Chippewa County: 63.4 %Chippewa County63.4Houghton County: 62.7 %Houghton County62.7Kalamazoo County: 62.5 %Kalamazoo County62.5Macomb County: 62.3 %Macomb County62.3Kent County: 62.3 %Kent County62.3Oakland County: 62.3 %Oakland County62.3Marquette County: 62.2 %Marquette County62.2Wayne County: 61.7 %Wayne County61.7Montcalm County: 61.4 %Montcalm County61.4Livingston County: 61.2 %Livingston County61.2Jackson County: 60.9 %Jackson County60.9Ottawa County: 60.9 %Ottawa County60.9Lapeer County: 60.8 %Lapeer County60.8Monroe County: 60.8 %Monroe County60.8Gratiot County: 60.7 %Gratiot County60.7St. Clair County: 60.6 %St. Clair County60.6Mecosta County: 60.5 %Mecosta County60.5Clinton County: 60.3 %Clinton County60.3Genesee County: 60.2 %Genesee County60.2Shiawassee County: 60.1 %Shiawassee County60.1Eaton County: 60.1 %Eaton County60.1Muskegon County: 60 %Muskegon County60Grand Traverse County: 59.8 %Grand Traverse County59.8Lenawee County: 59.7 %Lenawee County59.7Midland County: 59.6 %Midland County59.6Baraga County: 59.6 %Baraga County59.6Alger County: 59.5 %Alger County59.5Bay County: 59.5 %Bay County59.5Calhoun County: 59.3 %Calhoun County59.3Allegan County: 59.2 %Allegan County59.2Gogebic County: 59.1 %Gogebic County59.1Barry County: 58.9 %Barry County58.9Saginaw County: 58.9 %Saginaw County58.9Lake County: 58.8 %Lake County58.8Van Buren County: 58.5 %Van Buren County58.5Tuscola County: 58.4 %Tuscola County58.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2018 (%)Change on 2017
1Isabella County67.8-1 pts
2Washtenaw County67.6-0.3 pts
3Ingham County66.1-0.5 pts
4Ionia County63.5-0.1 pts
5Chippewa County63.4-0.5 pts
6Houghton County62.7-0.4 pts
7Kalamazoo County62.5-0.3 pts
8Macomb County62.3-0.1 pts
9Kent County62.3-0.1 pts
10Oakland County62.3-0.2 pts
11Marquette County62.2-0.6 pts
12Wayne County61.7-0.2 pts
13Montcalm County61.4+0.2 pts
14Livingston County61.2-0.2 pts
15Jackson County60.9-0.1 pts
16Ottawa County60.9-0.2 pts
17Lapeer County60.8-0.3 pts
18Monroe County60.8-0.3 pts
19Gratiot County60.7-0.6 pts
20St. Clair County60.6-0.2 pts
21Mecosta County60.5-0.5 pts
22Clinton County60.3-0.3 pts
23Genesee County60.2-0.2 pts
24Shiawassee County60.1-0.3 pts
25Eaton County60.1-0.3 pts
26Muskegon County60-0.4 pts
27Grand Traverse County59.8-0.5 pts
28Lenawee County59.7-0.3 pts
29Midland County59.6-0.4 pts
30Baraga County59.6-0.2 pts
31Alger County59.5-0.5 pts
32Bay County59.5-0.3 pts
33Calhoun County59.3-0.2 pts
34Allegan County59.2-0.3 pts
35Gogebic County59.1-0.8 pts
36Barry County58.9-0.2 pts
37Saginaw County58.9-0.5 pts
38Lake County58.8-1 pts
39Van Buren County58.5-0.3 pts
40Tuscola County58.4-0.4 pts
41Kalkaska County58.4-0.4 pts
42Cass County58.3-0.3 pts
43Hillsdale County58.2-0.4 pts
44Berrien County58.2-0.3 pts
45Newaygo County58.1-0.3 pts
46Otsego County58.1-0.4 pts
47Emmet County57.9-0.4 pts
48Dickinson County57.9-0.6 pts
49Branch County57.8-0.3 pts
50Alpena County57.8-0.4 pts
51St. Joseph County57.7-0.2 pts
52Wexford County57.7-0.1 pts
53Sanilac County57.5-0.3 pts
54Menominee County57.5-0.5 pts
55Manistee County57.4-0.4 pts
56Arenac County57.2-0.5 pts
57Luce County56.7-1.4 pts
58Clare County56.6-0.5 pts
59Charlevoix County56.5-0.4 pts
60Delta County56.5-0.4 pts
60Oceana County56.5+0.2 pts
62Crawford County56.5-0.2 pts
63Mason County56.3-0.8 pts
64Missaukee County56.2-0.1 pts
65Schoolcraft County56.1-0.3 pts
66Osceola County56.1-0.2 pts
67Huron County55.9-0.5 pts
68Benzie County55.9-0.3 pts
69Ogemaw County55.8-0.4 pts
70Mackinac County55.6-0.8 pts
71Cheboygan County55.5-0.4 pts
72Antrim County55.1-0.3 pts
73Gladwin County54.5-0.4 pts
74Iosco County53.9-0.3 pts
75Iron County53.8-0.5 pts
76Roscommon County53.7-0.2 pts
77Oscoda County53.5-0.4 pts
78Leelanau County52.9-0.7 pts
79Montmorency County52.8-0.4 pts
80Presque Isle County52.6-0.9 pts
81Ontonagon County52.1-1.2 pts
82Alcona County51.4-0.3 pts
83Keweenaw County50.1-1 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 Michigan by population aged 18 to 64, 2018) [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, 2018. 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=2018. 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, 2018. 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=2018.

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, 2018 [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=2018 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_michigan_by_2018,
  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, 2018}},
  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=2018. 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, 2018
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=2018
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/michigan-counties?period=2018.
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?

Isabella County, with 67.8% in 2018, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Keweenaw County, with 50.1% in 2018.

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