Demographic Data Report for District of Columbia Population: Age under 18 "All Races (includes Hispanic), Both Sexes" 2017-2021 American Community Survey 5-Year Data Sorted by Rank County, FIPS,Value (Percent),People (Age Under 18),Rank within US "United States",00000,22.5,74234075,"N/A" "District of Columbia",11001,18.3,125022,"2787 of 3143" Created by statecancerprofiles.cancer.gov on 03/28/2024 3:15 pm. Source: Demographic data provided by the Census Bureau (http://www.census.gov/) & the American Community Survey (http://www.census.gov/acs/www/). "For more information about Population: Age under 18, see the dictionary at http://statecancerprofiles.cancer.gov/dictionary.php#population." Data for United States does not include Puerto Rico.