Change Indicator

Population of children under age 18 in Hawaii

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Why This Indicator Matters

Due to declining birth rates and the growing aging population, the number of children under 18 is a much smaller share of the population today than 100 years ago.1 This population is racially and ethnically diverse and has unique needs, including access to quality education and employment. The population of children under 18 is projected to remain at the current level over the next few decades.2

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Definition and Source



Number of children under age 18

Data Source

Estimates 2010-2019: Annual Estimates of the Resident Population for Selected Age Groups by Sex: VINTAGE 2020.
Estimates 2020-2021: Annual State and County and Puerto Rico Municipio Resident Population Estimates by Selected Age Groups and Sex: April 1, 2020 to July 1, 2021.
Source: U.S. Census Bureau, Population Division

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.


1Child Trends. 2018. Number of Children. Retrieved January 2018 ( Annie E. Casey Foundation (AECF). 2019. “2019 Kids Count Data Book: State Trends in Child Well-being.” Available here:

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

Last Updated

December 2023