Metro Phoenix's Maricopa County had among the biggest population growth in white, Black, American Indian and Hispanic residents last year, as well as the biggest increase overall of any U.S. county. Meanwhile, Riverside and San Bernardino counties in California's Inland Empire also had some of the largest jumps in Hispanic and American Indian residents, according to population estimates released Thursday.
Fort Bend County in metro Houston, Maricopa County and Tarrant County, home to Fort Worth, Texas, had the largest county-level growth in Black residents. Asian resident increases were largest in metro Dallas, Southern California's Orange County and metro Seattle's King County, according to 2021 estimates released by the U.S. Census Bureau.
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California's Riverside County; Lee County, Florida, home to Fort Myers; and Utah County, home to Provo, Utah; also had some of the largest growth in white residents last year. The biggest growth for Native Hawaiian or other Pacific Islanders took place in metro Las Vegas' Clark County and California's Sacramento County.
The bureau earlier this year released estimates showing where population growth and decline took place in the U.S. from July 1, 2020, to July 1, 2021, capturing the first full year of the coronavirus pandemic. The data released Thursday fill in the demographic details on these changes which saw growth in Sunbelt destinations at the expense of some of the nation’s biggest, most densely populated and costly metropolitan areas.
Eight of the 10 largest cities in the U.S. lost population during the first year of the pandemic, with New York, Los Angeles and Chicago leading the way. The counties at the heart of those cities, Los Angeles, New York and Cook counties, also lost the most residents from mid-2020 to mid-2021, according to Thursday's estimates.
The biggest decline in Black residents was in Kings County, New York, which has the same boundaries as Brooklyn. The biggest declines of white, Asian and Hispanic residents were in Los Angeles County, which is the most populous county in the U.S. with 9.8 million residents. The biggest American Indian declines were in Bronx County, New York, and Los Angeles County, while the biggest decline for Native Hawaiian or other Pacific Islanders was in Honolulu.
An analysis by the Census Bureau released Thursday said the reason for the declines in the central counties of large metro areas was due to the flight of young adults in their early 20s to mid-30s during the first year of the pandemic since they were able to work remotely in lower-cost areas with other quality of life improvements.
“These patterns indicate that although young working-age adults are leaving the central counties of these large metro areas, they are simply relocating to other areas in the country," said the analysis by Census Bureau demographer Catherine Doren.
Maricopa County's leading pace of growth last year extended its breakneck population gains, as Phoenix was the fastest-growing big city in the United States between 2010 and 2020, according to the 2020 census. The estimates released Thursday capture a time early in the pandemic and don’t reflect changes since last summer.
From mid-2020 to mid-2021, the U.S. grew by 392,665 residents, and the U.S. population now stands at 331.8 million residents. During that time, the white population declined by 79,836 people, the only race or ethnic group to do so, because of deaths outpacing births. It was even more pronounced for whites who aren't Hispanic, with a 878,693-person dip.
The Hispanic population grew by 767,907 people, with natural increase from births outpacing deaths being the main driver. The Black population increased by 326,893 people, the Asian population rose by 281,167 people, the American Indian population gained 74,291 people and the Native Hawaiian or other Pacific Islander population grew by almost 26,000 people, all primarily through natural increase.
Immigration played a much smaller role than natural increase in U.S. population growth over the year, with almost 105,000 white immigrants, more than 89,500 Asian immigrants, more than 82,000 Hispanic immigrants and more than 53,000 Black immigrants. American Indians and Native Hawaiians each had less than 3,000 immigrants.
Meanwhile, the median age in the U.S. reached 38.8, a gain of 0.3 years last year and a jump of 3.4 years in the past two decades.
“The baby boomers aging is what is causing that increase in median age," said Allison Plyer, chief demographer at The Data Center in New Orleans.
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Follow Mike Schneider on Twitter at https://twitter.com/MikeSchneiderAP.