Definition

Number of children under age 18

Data Source

Annual County and Puerto Rico Municipio Resident Population Estimates by Single Year of Age and Sex: April 1, 2020 to July 1, 2024 (CC-EST2023-SYASEX)
Source: U.S. Census Bureau, Population Division
Estimates 2010-2019: Annual Estimates of the Resident Population for Selected Age Groups by Sex: VINTAGE 2020. Accessed on August 22, 2025.

Technical Note:

The Population Estimates Program data used here are revised to reflect updated input data and new Census Bureau population controls. Population estimates for previous years change with the release of each new 5-year Census estimate. Since the U.S. Census Bureau revises their post-2010 estimates each year, the data presented here may differ from previously published estimates.

Notes

1Child Trends. 2018. Number of Children. Retrieved January 2018 (https://www.childtrends.org/indicators/number-of-children). Annie E. Casey Foundation (AECF). 2019. “ Kids Count Data Book: State Trends in Child Well-being.” Available here: https://www.aecf.org/m/resourcedoc/aecf-2019kidscountdatabook-2019.pdf.

2 AECF. 2011. “The Changing Child Population of the United States: Analysis of Data from the 2010 Census.” KIDS COUNT Working Paper.

Last Updated

2025-09