The following is a press release from the U.S. Census Bureau:
Today, the U.S. Census Bureau released the 2020 Census Demographic Profile and Demographic and Housing Characteristics File (DHC). These products provide the next round of data available from the 2020 Census, adding more detail to the population counts and basic demographic and housing statistics previously released for the purposes of congressional apportionmentand legislative redistricting.
“These statistics belong to the American people. Thank you for your participation in the census and encouraging your friends, neighbors and community to respond. We’re giving these data back to you now to understand and benefit your community,” Census Bureau Director Robert L. Santos said. “2020 Census data will serve as an important baseline for years to come for our annual surveys and population estimates, and in the community planning and funding decisions taking place around the nation.”
The newly released 2020 Census data products go beyond the data already available on the total population, the voting-age (age 18 and older) population, race, Hispanic origin and housing occupancy. This release contains more detailed age groups, the first data available on sex from the 2020 Census, information on families and households, and more detail on housing. They also show the intersection of many of these topics by race and Hispanic origin.
The Demographic Profile provides an overview of the topics covered in the 2020 Census in one, easy-to-reference table for geographies down to the tract level. The DHC provides more detailed tables, many down to the block level. The Demographic Profile and many of the DHC tables are also available for ZIP Code Tabulation Areas — generalized representations of U.S. Postal Service ZIP Code service routes.
Data Highlights by Topic
Age and Sex
The 2020 Census shows the following about the nation’s age and sex composition:
Between 2010 and 2020, median age in the U.S. grew older due to an increase in the older population.
In 2020, there were 55.8 million people age 65 and over in the United States (16.8% of the total population), up 38.6% from 40.3 million in 2010. This growth primarily reflected the aging baby boom cohort.
Centenarians grew 50% since 2010, the fastest recent census-to-census percent change for that age group.
For people age 70 and over, the male population experienced a larger growth rate between 2010 and 2020 (42.2%) than females (29.5%).
In 1970, after all the Baby Boomers (1946-1964) had been born, half of the population was younger than 28.1 years old. By 2020, the median age was 38.8, an increase of more than 10 years over the past five decades.
In 2020, the population age 45 and over accounted for 42% of the total population, up from 27% in 1940, the census before the Baby Boom began.
The share of the population age 65 and over more than doubled between 1940 and 2020, from less than 7% to nearly 17%.
In 2020, there were over 73.1 million children under age 18 (22.1% of the total U.S. population), down 1.4% from 74.2 million in 2010. The biggest decline was among the under-5 age group, whose share of the population dropped by 8.9% or 1.8 million. This finding is consistent with the decline in the total number of births and the birth rate for the United States since 2015.
Among the states in 2020:
Fourteen states had a median age over 40, twice as many as in 2010.
Twenty-five states had higher shares of population age 65 and older than Florida had in 2010 (17.3%), when it had the highest share of any state. In 2020, Maine had the highest share at 21.8%, followed by Florida (21.2%) and Vermont (20.6%).
Utah and Maine were the youngest and oldest states (as they were in 2010). Nearly half of Utah’s population was under age 31 while more than half of Maine’s population was over age 45.
In 2020, females continued to comprise a slightly larger share (50.9%) of the total U.S. population — 168.8 million compared with almost 162.7 million males (49.1%). Females have outnumbered males since the 1950 Census. Before that, males outnumbered females from the nation’s earliest colonial times.
Alaska had the highest sex ratio of any state in 2020, with 108.4 males per 100 females, followed by North Dakota with 104.5 males per 100 females.
The five states with the lowest sex ratios in 2020 were Delaware (with 92.9 males per 100 females), Maryland (92.9), Mississippi (93.4), Alabama (93.4), and South Carolina (93.5).
In 2020, no state in the South or Northeast had a sex ratio above 100; all these states had more females than males.
In 2020, the total dependency ratio in the United States was 63.6 children under age 18 and adults age 65 and older for every 100 working-age people ages 18 to 64. The total dependency ratio provides a rough approximation of economic dependency in a population by dividing the dependent-age populations (children and adults age 65 and older, who are not generally expected to work) by the working-age population (ages 18 to 64).
Ten of the 12 states with the highest total dependency ratios in 2020 were in the West and Midwest. South Dakota and Idaho had the nation’s highest total dependency ratios of any state (73.0 and 72.4, respectively).
The public can explore these age and sex statistics in two data visualizations:
Exploring Age Groups in the 2020 Census. This interactive map shows certain measures — percent of population, percent change from 2010, percent female and racial and ethnic diversity index and prevalence — for a variety of age groups for the nation, states, counties and census tracts. The visualization also provides ranking lists of the measures.
How Has Our Nation’s Population Changed? This interactive visualization shows population pyramids and ranked age and sex measures for the total population, as well as race and Hispanic origin groups, for the nation, states, metropolitan areas, micropolitan areas and counties in 2020, 2010 and 2000.
A series of downloadable ranking tables related to each visualization is also available.
More information about age and sex is also available in the America Counts stories: An Aging U.S. Population With Fewer Children in 2020 and 2020 Census: 1 in 6 People in the United States Were 65 and Over, and two briefs: Age and Sex Composition: 2020 and The Older Population: 2020.
The full press release is much longer. You can read ther entire thing at: https://www.census.gov/newsroom/press-releases/2023/2020-census-demographic-profile-and-dhc.html.