America's middle-aged working class is shrinking

Much like the average hairline after 45, America’s middle-aged workforce is quietly thinning out.

New Census Bureau estimates show the number of Americans aged 45–64 shrank by 3.2% between 2020-25, falling to 81.3 million. That age group joins under-18s as the only two brackets currently experiencing population declines.

This wasn’t exactly unexpected…

The 45-64 age group is dominated by Gen X, the generation born during America’s “baby bust” that followed the post-World War II generation of Baby Boomers.

…but the impact is still significant. The 45–64 age group includes many of America's most experienced workers, including veteran teachers, senior managers, business owners, and civic leaders.

• As millions of Baby Boomers continue retiring, a shrinking pipeline of mid-career workers could make it harder to replace that institutional knowledge.
• This would also mean thinner leadership pipelines, fewer mentors for younger employees, and a smaller pool of peak earners supporting the tax base and caring for aging relatives.

Zoom out: The trend isn’t hitting everywhere equally. The Northeast and Midwest saw the steepest declines, while the South was the only region to post any growth in its 45–64 population since 2020.