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 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%.

“Children still outnumber older adults in the United States, despite a decline in births this decade,” said Lauren Bowers, chief of the Census Bureau’s Population Estimates Branch. “However, the gap is narrowing as baby boomers continue to age into their retirement years. In fact, the number of states and counties where older adults outnumber children is on the rise, especially in sparsely populated areas.”

As recently as 2020, there were just three states where older adults outnumbered children: Maine, Vermont, and Florida. By 2024, this number had increased to 11, with Delaware, Hawaii, Montana, New Hampshire, Oregon, Pennsylvania, Rhode Island, and West Virginia joining their ranks.

Similarly, from 2020 to 2024, the number of U.S. metro areas with more older adults than children increased from 58 to 112. This represents nearly 30% of the nation’s 387 metro areas. Additionally, in 2024, three metro areas with at least 1 million people (Cleveland, OH; Providence-Warwick, RI-MA; and Hartford-West Hartford-East Hartford, CT) had more older people than younger people for the first time. 

In 2020, 31.3% (or 983) of the nation’s 3,144 counties had more older adults than children. This figure increased to almost 45% (1,411 counties) in 2024. In both years, most of these counties had small populations and were located outside of metro and micro areas.

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