# Counties in New York by population under 18, 2025

All 62 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/new-york-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Rockland County | 31.1 |
| 2 | Orange County | 25 |
| 3 | Bronx County | 23.5 |
| 4 | Montgomery County | 23.4 |
| 5 | Jefferson County | 23.2 |
| 6 | Yates County | 22.7 |
| 7 | Lewis County | 22.4 |
| 8 | Sullivan County | 21.3 |
| 9 | Steuben County | 21.1 |
| 10 | Schenectady County | 20.8 |
| 11 | Cattaraugus County | 20.8 |
| 12 | Oneida County | 20.7 |
| 13 | Kings County | 20.7 |
| 14 | Nassau County | 20.6 |
| 15 | Richmond County | 20.4 |
| 16 | Westchester County | 20.4 |
| 17 | Chenango County | 20.3 |
| 18 | Seneca County | 20.3 |
| 19 | Wayne County | 20.1 |
| 20 | Oswego County | 20.1 |
| 21 | Herkimer County | 19.9 |
| 22 | Tioga County | 19.9 |
| 23 | Chautauqua County | 19.9 |
| 24 | Onondaga County | 19.9 |
| 25 | Chemung County | 19.8 |
| 26 | Suffolk County | 19.8 |
| 27 | Allegany County | 19.5 |
| 28 | St. Lawrence County | 19.5 |
| 29 | Erie County | 19.4 |
| 30 | Monroe County | 19.3 |
| 31 | Franklin County | 19.3 |
| 32 | Niagara County | 19.1 |
| 33 | Putnam County | 19 |
| 34 | Washington County | 18.9 |
| 35 | Orleans County | 18.7 |
| 36 | Fulton County | 18.7 |
| 37 | Genesee County | 18.6 |
| 38 | Cayuga County | 18.5 |
| 39 | Ontario County | 18.4 |
| 40 | Saratoga County | 18.3 |
| 41 | Madison County | 18.3 |
| 42 | Queens County | 18.2 |
| 43 | Rensselaer County | 18 |
| 44 | Broome County | 17.9 |
| 45 | Dutchess County | 17.8 |
| 46 | Schuyler County | 17.8 |
| 47 | Wyoming County | 17.7 |
| 48 | Cortland County | 17.7 |
| 49 | Clinton County | 17.6 |
| 50 | Livingston County | 17.5 |
| 51 | Albany County | 17.5 |
| 52 | Schoharie County | 17 |
| 53 | Warren County | 16.5 |
| 54 | Greene County | 16 |
| 55 | Ulster County | 16 |
| 56 | Otsego County | 15.9 |
| 57 | Delaware County | 15.6 |
| 58 | Columbia County | 14.9 |
| 59 | Essex County | 14.9 |
| 60 | Tompkins County | 13.3 |
| 61 | New York County | 12.9 |
| 62 | Hamilton County | 11.4 |