“The nation is aging — more than 4 out of every 5 counties were older in 2018 than in 2010. This aging is driven in large part by baby boomers crossing over the 65-year-old mark. Now, half of the U.S. population is over the age of 38.2,” said Luke Rogers, the Chief of the Population Estimates Branch at the Census Bureau. “Along with this general aging trend, we also see variation among race and ethnicity groups both in growth patterns and aging.” Rogers also noted that alone-or-in-combination groups overlap and individuals who identify as being two or more races are included in more than one of these race groups.
At the state level, North Dakota was the only state to see a decline in its median age, from 37.0 years in 2010 to 35.2 in 2018. Maine had the largest increase in median age this decade, going from 42.7 years in 2010 to 44.9 years in 2018, making it the state with the highest median age in the country. Utah had the lowest median age in 2018, at 31.0 years.
The share of the population age 65-and-older was 16.0 percent in 2018, growing by 3.2 percent (1,637,270) in the last year. The 65-and-older age group has increased 30.2 percent (12,159,974) since 2010. In contrast, during the same period, the under 18 population decreased by 1.1 percent, or a decline of 782,937 people.
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