# Counties in Michigan by population under 18, 2025

All 83 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_0_17_share`
- Unit: %
- Definition: 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.
- Source: 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: 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.
- Web page: https://invokely.ai/rankings/population-under-18/michigan-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | St. Joseph County | 23.5 |
| 2 | Branch County | 23.5 |
| 3 | Wayne County | 22.6 |
| 4 | Kent County | 22.5 |
| 5 | Osceola County | 22.2 |
| 6 | Allegan County | 22 |
| 7 | Van Buren County | 22 |
| 8 | Wexford County | 21.9 |
| 9 | Calhoun County | 21.8 |
| 10 | Ottawa County | 21.8 |
| 11 | Hillsdale County | 21.4 |
| 12 | Newaygo County | 21.4 |
| 13 | Muskegon County | 21.3 |
| 14 | Missaukee County | 21.3 |
| 15 | Genesee County | 21.1 |
| 16 | Kalamazoo County | 20.8 |
| 17 | Barry County | 20.7 |
| 18 | Oceana County | 20.7 |
| 19 | Midland County | 20.6 |
| 20 | Clinton County | 20.6 |
| 21 | Sanilac County | 20.3 |
| 22 | Eaton County | 20.3 |
| 23 | Ionia County | 20.3 |
| 24 | Berrien County | 20.2 |
| 25 | Jackson County | 20.2 |
| 26 | Shiawassee County | 20.2 |
| 27 | Cass County | 20 |
| 28 | Monroe County | 20 |
| 29 | Montcalm County | 19.9 |
| 30 | Lenawee County | 19.9 |
| 31 | Tuscola County | 19.8 |
| 32 | Macomb County | 19.8 |
| 33 | Otsego County | 19.7 |
| 33 | Saginaw County | 19.7 |
| 35 | Livingston County | 19.6 |
| 36 | Lapeer County | 19.4 |
| 37 | Oakland County | 19.4 |
| 38 | Houghton County | 19.3 |
| 39 | St. Clair County | 19.3 |
| 40 | Oscoda County | 19.2 |
| 41 | Clare County | 19.1 |
| 42 | Dickinson County | 19 |
| 43 | Ingham County | 19 |
| 44 | Mecosta County | 19 |
| 45 | Kalkaska County | 18.9 |
| 46 | Isabella County | 18.9 |
| 47 | Gladwin County | 18.8 |
| 48 | Bay County | 18.6 |
| 49 | Grand Traverse County | 18.5 |
| 50 | Huron County | 18.3 |
| 51 | Alpena County | 18.3 |
| 52 | Delta County | 18.1 |
| 53 | Baraga County | 18.1 |
| 54 | Mason County | 18 |
| 55 | Ogemaw County | 17.8 |
| 56 | Chippewa County | 17.7 |
| 57 | Crawford County | 17.6 |
| 58 | Arenac County | 17.6 |
| 59 | Washtenaw County | 17.2 |
| 60 | Schoolcraft County | 17.1 |
| 61 | Iosco County | 17 |
| 62 | Charlevoix County | 17 |
| 63 | Marquette County | 16.9 |
| 64 | Menominee County | 16.8 |
| 65 | Emmet County | 16.8 |
| 66 | Antrim County | 16.3 |
| 67 | Iron County | 16.3 |
| 68 | Benzie County | 16.2 |
| 69 | Gogebic County | 16.1 |
| 70 | Manistee County | 16.1 |
| 71 | Cheboygan County | 15.5 |
| 72 | Luce County | 15.4 |
| 73 | Keweenaw County | 15.1 |
| 74 | Leelanau County | 15 |
| 75 | Mackinac County | 14.8 |
| 76 | Lake County | 14.8 |
| 77 | Alger County | 14.8 |
| 78 | Presque Isle County | 14.8 |
| 79 | Gratiot County | 14.7 |
| 80 | Montmorency County | 14.7 |
| 81 | Roscommon County | 14 |
| 82 | Alcona County | 13.1 |
| 83 | Ontonagon County | 11.9 |