This was the first census since the U.S. Supreme Court legalized same-sex marriage in 2015. The tally showed that more than half of U.S. households contained coupled partners or spouses who lived together, and same-sex households made up 1.7 percent of those households. Since the census didn’t ask about sexual orientation, it didn’t capture LGBTQ+ people who are single or don’t live with a partner or spouse.
The median age varied widely by race and ethnicity. Non-Hispanic whites were the oldest cohort, with a median age of 44.5. Hispanics were the youngest, with a median age of 30; and a quarter of all children in the U.S. were Hispanic. Black Americans who weren’t Hispanic had a median age of 35.5. The number was 37.2 for Asians.
Utah, home to the largest Mormon population in the U.S., was the youngest state, with a median age of 31.3, a function of having one of the nation’s highest birthrates. The District of Columbia’s median age of 33.9 was a close second due to the large number of young, working-age adults commonly found in urban areas. North Dakota was the only state where the median age declined, from 37 to 35.8, as an influx of young workers arrived to work in a booming energy sector.
Maine was the oldest state in the U.S., with a median age of 45.1, as more baby boomers aged out of the workforce. Puerto Rico had a median age in the same range, at 45.2, as an exodus of working-age adults left the island after a series of hurricanes and government mismanagement. Older adults in four states — Florida, Maine, Vermont and West Virginia — made up more than a fifth of those states’ populations.
Sumter County, Fla., home of the booming retirement community The Villages, had the highest median age among U.S. counties, at 68.5; while Utah County, home to Provo, Utah, and Brigham Young University, had the lowest at 25.9.