The median age in the United States reached a record high of 38.9 in 2022, according to data released this by the Census Bureau, which is a rapid rise. While many 38-year-old millennials may still feel young, that age is an unusually high median for the country. The new data adds to the evidence that, like many European and Asian nations, the United States is graying, posing challenges for the work force, the economy and social programs.