Demographics Table
Demographic Data Report for Connecticut by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2020-2024 American Community Survey 5-Year Data
Sorted by Percent
County
|
2023 Rural-Urban Continuum Codes Φ
|
Value (Percent)
|
People (Age Under 18)
|
Rank within US (of 3143 counties)
|
|---|---|---|---|---|
| Connecticut | N/A | 20.2 | 731,586 | 42 of 52 |
| United States | N/A | 22.0 | 73,517,834 | N/A |
| Middlesex County | Urban | 16.6 | 27,506 | 2,930 |
| Litchfield County | Rural | 18.0 | 33,482 | 2,719 |
| Tolland County | Urban | 18.0 | 26,977 | 2,719 |
| Windham County | Urban | 18.8 | 21,977 | 2,580 |
| New London County | Urban | 19.2 | 51,602 | 2,493 |
| New Haven County | Urban | 20.0 | 173,775 | 2,262 |
| Hartford County | Urban | 20.6 | 185,366 | 2,055 |
| Fairfield County | Urban | 21.8 | 210,901 | 1,576 |
Notes:
Created by statecancerprofiles.cancer.gov on 03/21/2026 3:17 am.
Φ Rural–urban county classifications are based on the 2023 USDA Rural–Urban Continuum Codes (except for Connecticut Counties which use 2013 codes). State-level cancer rates for rural areas are calculated using cancer cases registered exclusively in rural counties, while state-level cancer rates for urban areas are calculated using cases registered exclusively in urban counties.
Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age under 18, see the dictionary.
Note: This website still uses Connecticut counties instead of planning regions for consistency of geographies across data topics. If/when all data sources have new planning regions, then this website will switch to using them.
Data for United States does not include Puerto Rico.