Data / Rankings / Uninsured rate, ages 35 to 64 (US, ACS) / Counties in Michigan

Counties in Michigan by uninsured rate, ages 35 to 64 (US, ACS)

Oscoda County had the highest uninsured rate, ages 35 to 64 (US, ACS) of 83 counties in 2021, at 16.4%. Washtenaw County had the lowest, at 3.5%. The median was 7.6% and the figure for Michigan was 6.4%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest16.4Oscoda County
Lowest3.5Washtenaw County
Median7.683 counties
Michigan6.4History

Map of counties, 2021

Alcona County: 7 %Alger County: 7.1 %Allegan County: 6.4 %Alpena County: 7.9 %Antrim County: 7.3 %Arenac County: 8.5 %Baraga County: 6.5 %Barry County: 5.9 %Bay County: 6.6 %Benzie County: 7 %Berrien County: 8 %Branch County: 8.6 %Calhoun County: 6.6 %Cass County: 6.9 %Charlevoix County: 8.1 %Cheboygan County: 10.2 %Chippewa County: 8.5 %Clare County: 12.4 %Clinton County: 3.9 %Crawford County: 6.5 %Delta County: 8.2 %Dickinson County: 6.1 %Eaton County: 5 %Emmet County: 7.3 %Genesee County: 6.4 %Gladwin County: 8.6 %Gogebic County: 8.1 %Grand Traverse County: 7.4 %Gratiot County: 6.5 %Hillsdale County: 7.9 %Houghton County: 7.6 %Huron County: 7.5 %Ingham County: 5.7 %Ionia County: 7.9 %Iosco County: 10.2 %Iron County: 8.7 %Isabella County: 9.3 %Jackson County: 7.4 %Kalamazoo County: 6.1 %Kalkaska County: 12 %Kent County: 5.9 %Keweenaw County: 12 %Lake County: 10.5 %Lapeer County: 9.2 %Leelanau County: 7.3 %Lenawee County: 7.7 %Livingston County: 4.5 %Luce County: 5.2 %Mackinac County: 14.1 %Macomb County: 6.3 %Manistee County: 7.2 %Marquette County: 5.8 %Mason County: 8.2 %Mecosta County: 8.2 %Menominee County: 6.4 %Midland County: 4.6 %Missaukee County: 10.7 %Monroe County: 4.7 %Montcalm County: 8.5 %Montmorency County: 12 %Muskegon County: 5.8 %Newaygo County: 8.2 %Oakland County: 4.9 %Oceana County: 11.1 %Ogemaw County: 7.8 %Ontonagon County: 9.7 %Osceola County: 12.2 %Oscoda County: 16.4 %Otsego County: 7.7 %Ottawa County: 3.6 %Presque Isle County: 7.5 %Roscommon County: 8.6 %Saginaw County: 5.1 %St. Clair County: 6.3 %St. Joseph County: 10.8 %Sanilac County: 8.1 %Schoolcraft County: 9.7 %Shiawassee County: 5.8 %Tuscola County: 7.7 %Van Buren County: 10.8 %Washtenaw County: 3.5 %Wayne County: 7.4 %Wexford County: 9 %
  • Under 5.9
  • 5.9 to 6.7
  • 6.7 to 7.6
  • 7.6 to 8.2
  • 8.2 to 9.9
  • 9.9 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

Oscoda County: 16.4 %Oscoda County16.4Mackinac County: 14.1 %Mackinac County14.1Clare County: 12.4 %Clare County12.4Osceola County: 12.2 %Osceola County12.2Kalkaska County: 12 %Kalkaska County12Montmorency County: 12 %Montmorency County12Keweenaw County: 12 %Keweenaw County12Oceana County: 11.1 %Oceana County11.1Van Buren County: 10.8 %Van Buren County10.8St. Joseph County: 10.8 %St. Joseph County10.8Missaukee County: 10.7 %Missaukee County10.7Lake County: 10.5 %Lake County10.5Cheboygan County: 10.2 %Cheboygan County10.2Iosco County: 10.2 %Iosco County10.2Schoolcraft County: 9.7 %Schoolcraft County9.7Ontonagon County: 9.7 %Ontonagon County9.7Isabella County: 9.3 %Isabella County9.3Lapeer County: 9.2 %Lapeer County9.2Wexford County: 9 %Wexford County9Iron County: 8.7 %Iron County8.7Branch County: 8.6 %Branch County8.6Gladwin County: 8.6 %Gladwin County8.6Roscommon County: 8.6 %Roscommon County8.6Arenac County: 8.5 %Arenac County8.5Chippewa County: 8.5 %Chippewa County8.5Montcalm County: 8.5 %Montcalm County8.5Mecosta County: 8.2 %Mecosta County8.2Mason County: 8.2 %Mason County8.2Delta County: 8.2 %Delta County8.2Newaygo County: 8.2 %Newaygo County8.2Charlevoix County: 8.1 %Charlevoix County8.1Gogebic County: 8.1 %Gogebic County8.1Sanilac County: 8.1 %Sanilac County8.1Berrien County: 8 %Berrien County8Ionia County: 7.9 %Ionia County7.9Hillsdale County: 7.9 %Hillsdale County7.9Alpena County: 7.9 %Alpena County7.9Ogemaw County: 7.8 %Ogemaw County7.8Lenawee County: 7.7 %Lenawee County7.7Otsego County: 7.7 %Otsego County7.7Oscoda County: 16.4 %Oscoda County16.4Mackinac County: 14.1 %Mackinac County14.1Clare County: 12.4 %Clare County12.4Osceola County: 12.2 %Osceola County12.2Kalkaska County: 12 %Kalkaska County12Montmorency County: 12 %Montmorency County12Keweenaw County: 12 %Keweenaw County12Oceana County: 11.1 %Oceana County11.1Van Buren County: 10.8 %Van Buren County10.8St. Joseph County: 10.8 %St. Joseph County10.8Missaukee County: 10.7 %Missaukee County10.7Lake County: 10.5 %Lake County10.5Cheboygan County: 10.2 %Cheboygan County10.2Iosco County: 10.2 %Iosco County10.2Schoolcraft County: 9.7 %Schoolcraft County9.7Ontonagon County: 9.7 %Ontonagon County9.7Isabella County: 9.3 %Isabella County9.3Lapeer County: 9.2 %Lapeer County9.2Wexford County: 9 %Wexford County9Iron County: 8.7 %Iron County8.7Branch County: 8.6 %Branch County8.6Gladwin County: 8.6 %Gladwin County8.6Roscommon County: 8.6 %Roscommon County8.6Arenac County: 8.5 %Arenac County8.5Chippewa County: 8.5 %Chippewa County8.5Montcalm County: 8.5 %Montcalm County8.5Mecosta County: 8.2 %Mecosta County8.2Mason County: 8.2 %Mason County8.2Delta County: 8.2 %Delta County8.2Newaygo County: 8.2 %Newaygo County8.2Charlevoix County: 8.1 %Charlevoix County8.1Gogebic County: 8.1 %Gogebic County8.1Sanilac County: 8.1 %Sanilac County8.1Berrien County: 8 %Berrien County8Ionia County: 7.9 %Ionia County7.9Hillsdale County: 7.9 %Hillsdale County7.9Alpena County: 7.9 %Alpena County7.9Ogemaw County: 7.8 %Ogemaw County7.8Lenawee County: 7.7 %Lenawee County7.7Otsego County: 7.7 %Otsego County7.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Oscoda County16.4
2Mackinac County14.1
3Clare County12.4
4Osceola County12.2
5Kalkaska County12
6Montmorency County12
7Keweenaw County12
8Oceana County11.1
9Van Buren County10.8
10St. Joseph County10.8
11Missaukee County10.7
12Lake County10.5
13Cheboygan County10.2
14Iosco County10.2
15Schoolcraft County9.7
16Ontonagon County9.7
17Isabella County9.3
18Lapeer County9.2
19Wexford County9
20Iron County8.7
21Branch County8.6
21Gladwin County8.6
23Roscommon County8.6
24Arenac County8.5
25Chippewa County8.5
26Montcalm County8.5
27Mecosta County8.2
28Mason County8.2
29Delta County8.2
30Newaygo County8.2
31Charlevoix County8.1
32Gogebic County8.1
32Sanilac County8.1
34Berrien County8
35Ionia County7.9
36Hillsdale County7.9
37Alpena County7.9
38Ogemaw County7.8
39Lenawee County7.7
40Otsego County7.7
41Tuscola County7.7
42Houghton County7.6
43Presque Isle County7.5
44Huron County7.5
45Grand Traverse County7.4
46Wayne County7.4
47Jackson County7.4
48Emmet County7.3
49Antrim County7.3
50Leelanau County7.3
51Manistee County7.2
52Alger County7.1
53Benzie County7
54Alcona County7
55Cass County6.9
56Bay County6.6
57Calhoun County6.6
58Gratiot County6.5
59Crawford County6.5
60Baraga County6.5
61Allegan County6.4
62Menominee County6.4
63Genesee County6.4
64Macomb County6.3
65St. Clair County6.3
66Dickinson County6.1
67Kalamazoo County6.1
68Barry County5.9
68Kent County5.9
70Marquette County5.8
70Muskegon County5.8
72Shiawassee County5.8
73Ingham County5.7
74Luce County5.2
75Saginaw County5.1
76Eaton County5
77Oakland County4.9
78Monroe County4.7
79Midland County4.6
80Livingston County4.5
81Clinton County3.9
82Ottawa County3.6
83Washtenaw County3.5

Other periods

About this ranking

People aged 35 to 64 without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population aged 35 to 64. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Coverage is what people reported at the interview, so the five-year figure averages five years of answers. People whose only coverage is the Indian Health Service count as uninsured. Active-duty military and people living in institutions are outside the universe. For single-year model-based county figures under 65, see uninsured_rate_under_65, uninsured_rate_18_64 and uninsured_rate_under_19 (SAHIE), a different source.

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. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. 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). American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs (Counties in Michigan by uninsured rate, ages 35 to 64 (US, ACS), 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat

MLA 9

American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in Michigan by uninsured rate, ages 35 to 64 (US, ACS), 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/michigan-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Counties in Michigan by uninsured rate, ages 35 to 64 (US, ACS), 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/michigan-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in Michigan by uninsured rate, ages 35 to 64 (US, ACS), 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-35-64/michigan-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_michigan_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in Michigan by uninsured rate, ages 35 to 64 (US, ACS), 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/michigan-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in Michigan by uninsured rate, ages 35 to 64 (US, ACS), 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat
L2  - https://invokely.ai/rankings/uninsured-rate-ages-35-64/michigan-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/michigan-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in Michigan by uninsured rate, ages 35 to 64 (US, ACS) using official data, and cite the source.
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Questions

Which county has the highest uninsured rate, ages 35 to 64 (US, ACS)?

Oscoda County, with 16.4% in 2021, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 35 to 64 (US, ACS)?

Washtenaw County, with 3.5% 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, American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, ages 35 to 64 (US, ACS): other rankings

Counties in Michigan: more rankings