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Demographics Table

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Demographic Data Report for Connecticut by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2019-2023 American Community Survey 5-Year Data
Sorted by Value

County
 sort alphabetically by name ascending
2023 Rural-Urban Continuum Codes Φ
 sort by rural urban descending
Value (Percent)
 sort by value descending
People (Age Under 18)
 sort by sample size ascending
Rank within US
(of 3143 counties)
 sort by rank ascending
Connecticut N/A 20.4 733,998 42 of 52
United States N/A 22.2 73,645,238 N/A
Middlesex County Urban 16.9 27,881 2,917
Tolland County Urban 18.2 26,744 2,731
Litchfield County Rural 18.3 34,055 2,702
Windham County Urban 18.7 21,693 2,629
New London County Urban 19.6 52,432 2,404
New Haven County Urban 20.3 174,687 2,213
Hartford County Urban 20.8 186,173 2,044
Fairfield County Urban 21.9 210,333 1,606
Notes:
Created by statecancerprofiles.cancer.gov on 06/24/2025 8:18 pm.

Φ Rural-Urban Continuum Codes provided by the USDA.

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. 2013 Rural-Urban Continuum Codes will be used for Connecticut counties.

Data for United States does not include Puerto Rico.

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