2020 Census

A family makes photographs beneath the cherry blossoms at the Fairmount Park Horticulture Center in Philadelphia on April 8, 2022. America's aging was propelled by the two largest age cohorts in the U.S. — greying baby boomers and millennials becoming adults. Fewer children also were born between 2010 and 2020, according to numbers from the once-a-decade head count of every U.S. resident. The decline stems from younger women delaying having babies until later in life in order to focus on their education and start their careers, but also birth rates never recovered following the recession in the late 2000s, according to experts. 

The United States grew older, faster, last decade.

The share of residents 65 or older grew by more than a third from 2010 to 2020 and at the fastest rate of any decade in 130 years, while the share of children declined, according to new figures from the most recent census.

The declining percentage of children under age 5 was particularly noteworthy in the figures from the 2020 head count released Thursday. Combined, the trends mean the median age in the U.S. jumped from 37.2 to 38.8 over the decade.

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