Data / Rankings / Population under 18 / Counties in Michigan

Counties in Michigan by population under 18

St. Joseph County had the highest population under 18 of 83 counties in 2014, at 25.2%. Ontonagon County had the lowest, at 13.2%. The median was 20.8% and the figure for Michigan was 22.5%. Source: the U.S. Census Bureau.

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Highest25.2St. Joseph County
Lowest13.2Ontonagon County
Median20.883 counties
Michigan22.5History

Map of counties, 2014

Alcona County: 13.2 %Alger County: 15.6 %Allegan County: 25.1 %Alpena County: 19.4 %Antrim County: 19.1 %Arenac County: 18.2 %Baraga County: 19.2 %Barry County: 23.2 %Bay County: 21 %Benzie County: 19.2 %Berrien County: 22.5 %Branch County: 24.3 %Calhoun County: 23.4 %Cass County: 21.8 %Charlevoix County: 20.2 %Cheboygan County: 18.4 %Chippewa County: 19.2 %Clare County: 20.1 %Clinton County: 23.6 %Crawford County: 18.5 %Delta County: 20.3 %Dickinson County: 20.1 %Eaton County: 22.1 %Emmet County: 20.6 %Genesee County: 23.5 %Gladwin County: 19.4 %Gogebic County: 15.9 %Grand Traverse County: 20.8 %Gratiot County: 21.5 %Hillsdale County: 22.7 %Houghton County: 20.4 %Huron County: 19.6 %Ingham County: 20.5 %Ionia County: 23.1 %Iosco County: 17.2 %Iron County: 16.4 %Isabella County: 18.3 %Jackson County: 22.1 %Kalamazoo County: 22.3 %Kalkaska County: 21.3 %Kent County: 25.1 %Keweenaw County: 17.7 %Lake County: 16.6 %Lapeer County: 22.3 %Leelanau County: 17.8 %Lenawee County: 21.9 %Livingston County: 23.4 %Luce County: 18 %Mackinac County: 17.2 %Macomb County: 21.8 %Manistee County: 17.8 %Marquette County: 18.4 %Mason County: 20.6 %Mecosta County: 19.8 %Menominee County: 19.6 %Midland County: 22.1 %Missaukee County: 23.3 %Monroe County: 22.6 %Montcalm County: 22.8 %Montmorency County: 15.3 %Muskegon County: 23.6 %Newaygo County: 23.2 %Oakland County: 22.1 %Oceana County: 24 %Ogemaw County: 18.9 %Ontonagon County: 13.2 %Osceola County: 24 %Oscoda County: 18.3 %Otsego County: 21.2 %Ottawa County: 25 %Presque Isle County: 16.6 %Roscommon County: 14.8 %Saginaw County: 22.2 %St. Clair County: 21.9 %St. Joseph County: 25.2 %Sanilac County: 22.4 %Schoolcraft County: 18.3 %Shiawassee County: 22.2 %Tuscola County: 22 %Van Buren County: 24.2 %Washtenaw County: 19.6 %Wayne County: 24 %Wexford County: 23.4 %
  • Under 18
  • 18 to 19
  • 19 to 21
  • 21 to 22
  • 22 to 23
  • 23 and over
%, 2014. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2014

St. Joseph County: 25.2 %St. Joseph County25.2Allegan County: 25.1 %Allegan County25.1Kent County: 25.1 %Kent County25.1Ottawa County: 25 %Ottawa County25Branch County: 24.3 %Branch County24.3Van Buren County: 24.2 %Van Buren County24.2Oceana County: 24 %Oceana County24Wayne County: 24 %Wayne County24Osceola County: 24 %Osceola County24Muskegon County: 23.6 %Muskegon County23.6Clinton County: 23.6 %Clinton County23.6Genesee County: 23.5 %Genesee County23.5Calhoun County: 23.4 %Calhoun County23.4Livingston County: 23.4 %Livingston County23.4Wexford County: 23.4 %Wexford County23.4Missaukee County: 23.3 %Missaukee County23.3Barry County: 23.2 %Barry County23.2Newaygo County: 23.2 %Newaygo County23.2Ionia County: 23.1 %Ionia County23.1Montcalm County: 22.8 %Montcalm County22.8Hillsdale County: 22.7 %Hillsdale County22.7Monroe County: 22.6 %Monroe County22.6Berrien County: 22.5 %Berrien County22.5Sanilac County: 22.4 %Sanilac County22.4Lapeer County: 22.3 %Lapeer County22.3Kalamazoo County: 22.3 %Kalamazoo County22.3Shiawassee County: 22.2 %Shiawassee County22.2Saginaw County: 22.2 %Saginaw County22.2Jackson County: 22.1 %Jackson County22.1Oakland County: 22.1 %Oakland County22.1Eaton County: 22.1 %Eaton County22.1Midland County: 22.1 %Midland County22.1Tuscola County: 22 %Tuscola County22St. Clair County: 21.9 %St. Clair County21.9Lenawee County: 21.9 %Lenawee County21.9Cass County: 21.8 %Cass County21.8Macomb County: 21.8 %Macomb County21.8Gratiot County: 21.5 %Gratiot County21.5Kalkaska County: 21.3 %Kalkaska County21.3Otsego County: 21.2 %Otsego County21.2St. Joseph County: 25.2 %St. Joseph County25.2Allegan County: 25.1 %Allegan County25.1Kent County: 25.1 %Kent County25.1Ottawa County: 25 %Ottawa County25Branch County: 24.3 %Branch County24.3Van Buren County: 24.2 %Van Buren County24.2Oceana County: 24 %Oceana County24Wayne County: 24 %Wayne County24Osceola County: 24 %Osceola County24Muskegon County: 23.6 %Muskegon County23.6Clinton County: 23.6 %Clinton County23.6Genesee County: 23.5 %Genesee County23.5Calhoun County: 23.4 %Calhoun County23.4Livingston County: 23.4 %Livingston County23.4Wexford County: 23.4 %Wexford County23.4Missaukee County: 23.3 %Missaukee County23.3Barry County: 23.2 %Barry County23.2Newaygo County: 23.2 %Newaygo County23.2Ionia County: 23.1 %Ionia County23.1Montcalm County: 22.8 %Montcalm County22.8Hillsdale County: 22.7 %Hillsdale County22.7Monroe County: 22.6 %Monroe County22.6Berrien County: 22.5 %Berrien County22.5Sanilac County: 22.4 %Sanilac County22.4Lapeer County: 22.3 %Lapeer County22.3Kalamazoo County: 22.3 %Kalamazoo County22.3Shiawassee County: 22.2 %Shiawassee County22.2Saginaw County: 22.2 %Saginaw County22.2Jackson County: 22.1 %Jackson County22.1Oakland County: 22.1 %Oakland County22.1Eaton County: 22.1 %Eaton County22.1Midland County: 22.1 %Midland County22.1Tuscola County: 22 %Tuscola County22St. Clair County: 21.9 %St. Clair County21.9Lenawee County: 21.9 %Lenawee County21.9Cass County: 21.8 %Cass County21.8Macomb County: 21.8 %Macomb County21.8Gratiot County: 21.5 %Gratiot County21.5Kalkaska County: 21.3 %Kalkaska County21.3Otsego County: 21.2 %Otsego County21.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2014 (%)Change on 2013
1St. Joseph County25.2-0.1 pts
2Allegan County25.1-0.1 pts
3Kent County25.1-0.3 pts
4Ottawa County25-0.2 pts
5Branch County24.3+0.1 pts
6Van Buren County24.2-0.1 pts
7Oceana County24-0.1 pts
8Wayne County24-0.2 pts
9Osceola County24-0.1 pts
10Muskegon County23.6-0.2 pts
11Clinton County23.6-0.3 pts
12Genesee County23.5-0.3 pts
13Calhoun County23.4-0.1 pts
14Livingston County23.4-0.5 pts
15Wexford County23.4-0 pts
16Missaukee County23.3-0.2 pts
17Barry County23.2-0.3 pts
18Newaygo County23.2-0.3 pts
19Ionia County23.1-0.3 pts
20Montcalm County22.8-0.3 pts
21Hillsdale County22.7-0.1 pts
22Monroe County22.6-0.3 pts
23Berrien County22.5-0.1 pts
24Sanilac County22.4-0.3 pts
25Lapeer County22.3-0.4 pts
26Kalamazoo County22.3-0.1 pts
27Shiawassee County22.2-0.3 pts
28Saginaw County22.2-0.2 pts
29Jackson County22.1-0.3 pts
30Oakland County22.1-0.3 pts
31Eaton County22.1-0.4 pts
32Midland County22.1-0.4 pts
33Tuscola County22-0.2 pts
34St. Clair County21.9-0.3 pts
35Lenawee County21.9-0.2 pts
36Cass County21.8-0.1 pts
37Macomb County21.8-0.3 pts
38Gratiot County21.5+0.2 pts
39Kalkaska County21.3-0.4 pts
40Otsego County21.2-0.6 pts
41Bay County21-0.2 pts
42Grand Traverse County20.8-0.2 pts
43Mason County20.6-0 pts
44Emmet County20.6-0.5 pts
45Ingham County20.5-0 pts
46Houghton County20.40 pts
47Delta County20.3-0.1 pts
48Charlevoix County20.2-0.5 pts
49Clare County20.1+0.1 pts
50Dickinson County20.1-0.1 pts
51Mecosta County19.8-0 pts
52Menominee County19.6-0.2 pts
53Washtenaw County19.6-0.3 pts
54Huron County19.6-0.1 pts
55Alpena County19.4-0.2 pts
56Gladwin County19.4-0.2 pts
57Chippewa County19.2-0.3 pts
58Benzie County19.2-0.1 pts
59Baraga County19.2-0.3 pts
60Antrim County19.1-0.2 pts
61Ogemaw County18.9-0.4 pts
62Crawford County18.5-0.4 pts
63Cheboygan County18.4-0.4 pts
64Marquette County18.4-0 pts
65Schoolcraft County18.3-0.4 pts
66Isabella County18.3+0.3 pts
67Oscoda County18.3-0.5 pts
68Arenac County18.2-0.2 pts
69Luce County18-0.3 pts
70Leelanau County17.8-0.2 pts
71Manistee County17.8-0.2 pts
72Keweenaw County17.70 pts
73Iosco County17.2-0.1 pts
74Mackinac County17.2-0.1 pts
75Presque Isle County16.6-0.2 pts
76Lake County16.6-0.5 pts
77Iron County16.4-0.2 pts
78Gogebic County15.9-0.3 pts
79Alger County15.6-0.2 pts
80Montmorency County15.3-0.2 pts
81Roscommon County14.8-0.2 pts
82Alcona County13.2-0.4 pts
83Ontonagon County13.2-0.5 pts

Other periods

About this ranking

Residents aged 0 to 17 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.

Uses the US age of majority. Not comparable with population_0_14_share, which stops at 14.

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 0 to 17 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 0 to 17 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 under 18, 2014) [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 0 to 17 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 under 18, 2014. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-under-18/michigan-counties?period=2014. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18, 2014. 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-under-18/michigan-counties?period=2014.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18, 2014 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/michigan-counties?period=2014 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_michigan_by_2014,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18, 2014}},
  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-under-18/michigan-counties?period=2014. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 0 to 17 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 under 18, 2014
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-under-18/michigan-counties?period=2014
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/michigan-counties?period=2014.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18 using official data, and cite the source.
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Questions

Which county has the highest population under 18?

St. Joseph County, with 25.2% in 2014, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Ontonagon County, with 13.2% in 2014.

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 0 to 17 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 under 18: other rankings

Counties in Michigan: more rankings