In 2021, there were about **** million children under the age of 18 years old in California -- the most out of any state. In that same year, Texas, Florida, New York, and Illinois rounded out the top five states with the most children under 18.
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U.S. Census Bureau. (September 20, 2022). Population aged under 18 years in the United States in 2021, by state (in 1,000s) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 19, 2026, from /statistics/301928/us-population-under-18-by-state/
U.S. Census Bureau. "Population aged under 18 years in the United States in 2021, by state (in 1,000s)." Chart. September 20, 2022. ÌÇÐÄÆƽâ°æ. Accessed July 19, 2026. /statistics/301928/us-population-under-18-by-state/
U.S. Census Bureau. (2022). Population aged under 18 years in the United States in 2021, by state (in 1,000s). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 19, 2026. /statistics/301928/us-population-under-18-by-state/
U.S. Census Bureau. "Population Aged under 18 Years in The United States in 2021, by State (in 1,000s)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 20 Sep 2022, /statistics/301928/us-population-under-18-by-state/
U.S. Census Bureau, Population aged under 18 years in the United States in 2021, by state (in 1,000s) ÌÇÐÄÆƽâ°æ, /statistics/301928/us-population-under-18-by-state/ (last visited July 19, 2026)
Population aged under 18 years in the United States in 2021, by state (in 1,000s) [Graph], U.S. Census Bureau, September 20, 2022. [Online]. Available: /statistics/301928/us-population-under-18-by-state/
