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 2020, at 66.7%. Keweenaw County had the lowest, at 48.9%. The median was 57.5% and the figure for Michigan was 60.5%. Source: the U.S. Census Bureau.

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Highest66.7Washtenaw County
Lowest48.9Keweenaw County
Median57.583 counties
Michigan60.5History

Map of counties, 2020

Alcona County: 51 %Alger County: 58.7 %Allegan County: 58.5 %Alpena County: 56.6 %Antrim County: 54.4 %Arenac County: 55.4 %Baraga County: 58.8 %Barry County: 58.4 %Bay County: 58.8 %Benzie County: 55.2 %Berrien County: 57.5 %Branch County: 57.1 %Calhoun County: 58.6 %Cass County: 57.5 %Charlevoix County: 55.8 %Cheboygan County: 55.1 %Chippewa County: 62.2 %Clare County: 55.6 %Clinton County: 59.5 %Crawford County: 55.5 %Delta County: 55.4 %Dickinson County: 56.8 %Eaton County: 59.2 %Emmet County: 57 %Genesee County: 59.5 %Gladwin County: 53.7 %Gogebic County: 55.2 %Grand Traverse County: 58.7 %Gratiot County: 60.4 %Hillsdale County: 57.3 %Houghton County: 61.8 %Huron County: 54.8 %Ingham County: 65.3 %Ionia County: 63 %Iosco County: 52.7 %Iron County: 53.1 %Isabella County: 65.9 %Jackson County: 60.1 %Kalamazoo County: 61.6 %Kalkaska County: 57.6 %Kent County: 61.8 %Keweenaw County: 48.9 %Lake County: 57.5 %Lapeer County: 60 %Leelanau County: 51.1 %Lenawee County: 58.9 %Livingston County: 60.5 %Luce County: 61.5 %Mackinac County: 53.7 %Macomb County: 61.7 %Manistee County: 56.3 %Marquette County: 61.5 %Mason County: 54.7 %Mecosta County: 59.7 %Menominee County: 56.2 %Midland County: 58.7 %Missaukee County: 55.9 %Monroe County: 60.1 %Montcalm County: 60.9 %Montmorency County: 51.6 %Muskegon County: 59 %Newaygo County: 57.4 %Oakland County: 61.8 %Oceana County: 55.8 %Ogemaw County: 54.9 %Ontonagon County: 51.5 %Osceola County: 55.3 %Oscoda County: 51.6 %Otsego County: 57.3 %Ottawa County: 60.3 %Presque Isle County: 51.6 %Roscommon County: 52.5 %Saginaw County: 58.1 %St. Clair County: 59.8 %St. Joseph County: 56.9 %Sanilac County: 56.6 %Schoolcraft County: 54.4 %Shiawassee County: 59.3 %Tuscola County: 57.7 %Van Buren County: 57.6 %Washtenaw County: 66.7 %Wayne County: 61.1 %Wexford County: 56.7 %
  • Under 55
  • 55 to 56
  • 56 to 57
  • 57 to 59
  • 59 to 61
  • 61 and over
%, 2020. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2020

Washtenaw County: 66.7 %Washtenaw County66.7Isabella County: 65.9 %Isabella County65.9Ingham County: 65.3 %Ingham County65.3Ionia County: 63 %Ionia County63Chippewa County: 62.2 %Chippewa County62.2Houghton County: 61.8 %Houghton County61.8Oakland County: 61.8 %Oakland County61.8Kent County: 61.8 %Kent County61.8Macomb County: 61.7 %Macomb County61.7Kalamazoo County: 61.6 %Kalamazoo County61.6Luce County: 61.5 %Luce County61.5Marquette County: 61.5 %Marquette County61.5Wayne County: 61.1 %Wayne County61.1Montcalm County: 60.9 %Montcalm County60.9Livingston County: 60.5 %Livingston County60.5Gratiot County: 60.4 %Gratiot County60.4Ottawa County: 60.3 %Ottawa County60.3Monroe County: 60.1 %Monroe County60.1Jackson County: 60.1 %Jackson County60.1Lapeer County: 60 %Lapeer County60St. Clair County: 59.8 %St. Clair County59.8Mecosta County: 59.7 %Mecosta County59.7Clinton County: 59.5 %Clinton County59.5Genesee County: 59.5 %Genesee County59.5Shiawassee County: 59.3 %Shiawassee County59.3Eaton County: 59.2 %Eaton County59.2Muskegon County: 59 %Muskegon County59Lenawee County: 58.9 %Lenawee County58.9Baraga County: 58.8 %Baraga County58.8Bay County: 58.8 %Bay County58.8Grand Traverse County: 58.7 %Grand Traverse County58.7Midland County: 58.7 %Midland County58.7Alger County: 58.7 %Alger County58.7Calhoun County: 58.6 %Calhoun County58.6Allegan County: 58.5 %Allegan County58.5Barry County: 58.4 %Barry County58.4Saginaw County: 58.1 %Saginaw County58.1Tuscola County: 57.7 %Tuscola County57.7Kalkaska County: 57.6 %Kalkaska County57.6Van Buren County: 57.6 %Van Buren County57.6Washtenaw County: 66.7 %Washtenaw County66.7Isabella County: 65.9 %Isabella County65.9Ingham County: 65.3 %Ingham County65.3Ionia County: 63 %Ionia County63Chippewa County: 62.2 %Chippewa County62.2Houghton County: 61.8 %Houghton County61.8Oakland County: 61.8 %Oakland County61.8Kent County: 61.8 %Kent County61.8Macomb County: 61.7 %Macomb County61.7Kalamazoo County: 61.6 %Kalamazoo County61.6Luce County: 61.5 %Luce County61.5Marquette County: 61.5 %Marquette County61.5Wayne County: 61.1 %Wayne County61.1Montcalm County: 60.9 %Montcalm County60.9Livingston County: 60.5 %Livingston County60.5Gratiot County: 60.4 %Gratiot County60.4Ottawa County: 60.3 %Ottawa County60.3Monroe County: 60.1 %Monroe County60.1Jackson County: 60.1 %Jackson County60.1Lapeer County: 60 %Lapeer County60St. Clair County: 59.8 %St. Clair County59.8Mecosta County: 59.7 %Mecosta County59.7Clinton County: 59.5 %Clinton County59.5Genesee County: 59.5 %Genesee County59.5Shiawassee County: 59.3 %Shiawassee County59.3Eaton County: 59.2 %Eaton County59.2Muskegon County: 59 %Muskegon County59Lenawee County: 58.9 %Lenawee County58.9Baraga County: 58.8 %Baraga County58.8Bay County: 58.8 %Bay County58.8Grand Traverse County: 58.7 %Grand Traverse County58.7Midland County: 58.7 %Midland County58.7Alger County: 58.7 %Alger County58.7Calhoun County: 58.6 %Calhoun County58.6Allegan County: 58.5 %Allegan County58.5Barry County: 58.4 %Barry County58.4Saginaw County: 58.1 %Saginaw County58.1Tuscola County: 57.7 %Tuscola County57.7Kalkaska County: 57.6 %Kalkaska County57.6Van Buren County: 57.6 %Van Buren County57.6
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2020 (%)Change on 2019
1Washtenaw County66.7-0.4 pts
2Isabella County65.9-0.8 pts
3Ingham County65.3-0.5 pts
4Ionia County63-0.4 pts
5Chippewa County62.2-0.8 pts
6Houghton County61.8-0.3 pts
7Oakland County61.8-0.3 pts
8Kent County61.8-0.3 pts
9Macomb County61.7-0.4 pts
10Kalamazoo County61.6-0.5 pts
11Luce County61.5+5.6 pts
12Marquette County61.5-0.4 pts
13Wayne County61.1-0.4 pts
14Montcalm County60.9-0.4 pts
15Livingston County60.5-0.4 pts
16Gratiot County60.4-0.3 pts
17Ottawa County60.3-0.2 pts
18Monroe County60.1-0.4 pts
19Jackson County60.1-0.6 pts
20Lapeer County60-0.4 pts
21St. Clair County59.8-0.5 pts
22Mecosta County59.70 pts
23Clinton County59.5-0.4 pts
24Genesee County59.5-0.4 pts
25Shiawassee County59.3-0.4 pts
26Eaton County59.2-0.4 pts
27Muskegon County59-0.6 pts
28Lenawee County58.9-0.5 pts
29Baraga County58.8-0.3 pts
30Bay County58.8-0.4 pts
31Grand Traverse County58.7-0.6 pts
32Midland County58.7-0.4 pts
33Alger County58.7-0.5 pts
34Calhoun County58.6-0.6 pts
35Allegan County58.5-0.4 pts
36Barry County58.4-0.1 pts
37Saginaw County58.1-0.4 pts
38Tuscola County57.7-0.3 pts
39Kalkaska County57.6-0.8 pts
40Van Buren County57.6-0.5 pts
41Lake County57.5-0.8 pts
42Cass County57.5-0.5 pts
43Berrien County57.5-0.4 pts
44Newaygo County57.4-0.4 pts
45Hillsdale County57.3-0.6 pts
46Otsego County57.3-0.7 pts
47Branch County57.1-0.3 pts
48Emmet County57-0.5 pts
49St. Joseph County56.9-0.6 pts
50Dickinson County56.8-0.5 pts
51Wexford County56.7-0.6 pts
52Sanilac County56.6-0.4 pts
53Alpena County56.6-0.7 pts
54Manistee County56.3-0.8 pts
55Menominee County56.2-0.7 pts
56Missaukee County55.9-0.3 pts
57Charlevoix County55.8-0.3 pts
58Oceana County55.8-0.2 pts
59Clare County55.6-0.6 pts
60Crawford County55.5-0.7 pts
61Delta County55.4-0.7 pts
62Arenac County55.4-0.7 pts
63Osceola County55.3-0.4 pts
64Gogebic County55.2-0.4 pts
65Benzie County55.2-0.4 pts
66Cheboygan County55.10 pts
67Ogemaw County54.9-0.4 pts
68Huron County54.8-0.7 pts
69Mason County54.7-1 pts
70Antrim County54.4-0.1 pts
71Schoolcraft County54.4-0.5 pts
72Gladwin County53.7-0.5 pts
73Mackinac County53.7-0.9 pts
74Iron County53.1-0.3 pts
75Iosco County52.7-0.7 pts
76Roscommon County52.5-0.6 pts
77Oscoda County51.6-1.1 pts
78Presque Isle County51.6-0.5 pts
79Montmorency County51.6-1 pts
80Ontonagon County51.5-0 pts
81Leelanau County51.1-0.9 pts
82Alcona County51-0.4 pts
83Keweenaw County48.9-1 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, 2020) [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, 2020. 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=2020. 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, 2020. 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=2020.

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, 2020 [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=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_michigan_by_2020,
  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, 2020}},
  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=2020. 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, 2020
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=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/michigan-counties?period=2020.
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 66.7% in 2020, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Keweenaw County, with 48.9% in 2020.

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