According to a new report from the U.S. Census Bureau, the national median age of Americans has increased by 3.4 years to 38.8, with the largest single-year gain of 0.3 years coming in 2021, the year after the coronavirus pandemic hit. The birthrate nationwide has been declining, and decreased immigration levels have accelerated the decline.
You can read more in an article by Tara Bahrampour published in the Washington Post at: https://www.washingtonpost.com/dc-md-va/2022/06/30/census-us-population-older-more-diverse/.