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More Americans were this age than any other in 2015, Census reports
Americans overall are older, according to the U.S. Census, and more diverse than in the past. But what single age in 2015 had more people than any other? - photo by Lois M. Collins
Americans' average age is getting older, but there were more 24-year-olds in 2015 than any other single age, at 4.7 million. The nation's total population was 321,418,820.

That's according to a new population estimate by the U.S. Census Bureau that said the median age was 37.8. Residents in some counties are, on average, quite a bit older, including Charlotte, Florida, at 58.4 years; Alcona, Michigan, at 57.9 years, and Jefferson, Washington, and Ontonagon, Michigan, which tied at 57.3 years.

The three youngest counties are Lexington, Virginia, at a median age of 22.4 years; Madison, Idaho, at 23.2 years; and Kusilvak Census Area, Arkansas, at 23.2 years.

The bureau said 61 million Americans were born since Jan. 1, 2000. Those over age 65 now number 47.8 million, 1.6 million more than the year before.

The only state listed as getting younger was North Dakota, where the median age dropped from 34.9 in 2014 to 34.6 in 2015. reported that "the changing face of America is reflected in new census estimates released Thursday showing that minority groups now make up a combined 38.4 percent of the U.S. population."

The fastest-growing race was Asians. According to Fusion, "Asian population growth in the U.S. is due largely to net migration, the bureau said. Data from the Migration Policy Institute show that the number of immigrants hailing from Asia, which includes the Middle East, outnumbered those coming from Mexico 12.8 million to 11.8 million in 2014. Chinese immigrants (including Taiwanese and Hong Kong natives) constituted the largest Asian immigrant population, followed by Indians and Filipinos. Southeast Asia was the largest Asian region of origin."

The Census said in 2015, there were nearly 248 million whites, close to 43 million blacks, just shy of 18 million Asians, slightly more than 4 million American Indian and Alaska Natives, about 760,000 Native Hawaiian and Pacific Islander and just over 8 million who are two or more races. More than 56.5 million in America are of Hispanic origin, across all those races.