Older Adults Outnumber Children in 11 States and Nearly Half of U.S. Counties 

JUNE 26, 2025 — The U.S. population age 65 and older rose by 3.1% (to 61.2 million) while the population under age 18 decreased by 0.2% (to 73.1 million) from 2023 to 2024, according to the Vintage 2024 Population Estimates released today by the U.S. Census Bureau.

The data show the population continued to age, with the share of the population age 65 and older steadily increasing from 12.4% in 2004 to 18.0% in 2024, and the share of children declining from 25.0% to 21.5%.

Ongoing growth among the older population, coupled with persistent annual declines in the population under age 18 has reduced the size difference between these two age groups from just over 20 million in 2020 to just below 12 million in 2024. From 2020 to 2024, the older population grew by 13.0%, significantly outpacing the 1.4% growth of working-age adults (ages 18 to 64), while the number of children declined by 1.7%.

Continue reading to explore more data highlights on the U.S. population by age, sex, race and Hispanic origin.