US Population Ages 45-64 Declines by 2.68 Million
The US population ages 45-64 has decreased by 2.68 million from 2020 to 2025, according to Census Bureau estimates. This decline could lead to fewer experienced adults to run institutions and care for the growing older population.
The US population ages 45-64 fell by 2.68 million from April 1, 2020, to July 1, 2025, according to new Census Bureau population estimates. This age group, which includes most of Generation X and younger baby boomers, declined 3.2% nationally, from 84 million to 81.3 million. The Northeast had the steepest percentage drop, falling 7.1%, while the South was the only region where the 45-64 population grew, adding 18,749 people, or 0.1%.
The decline is happening as the country gets older overall, with the US median age rising to 39.4 in July 2025, up from 38.6 in April 2020. The 65-and-older population grew 16.2% nationally during the same period, while the under-18 population fell 2.4%. The 45-64 group isn't vanishing, but rather aging up, with younger boomers moving into retirement age and older Gen X cohorts filling in behind them.
This demographic shift could leave fewer experienced adults to run institutions, mentor younger workers, and care for the fast-growing population behind them. Corporations and local governments should be on high alert, as the 45-64 demographic typically represents peak earners who anchor municipal tax bases and possess decades of institutional knowledge.
Go Deeper
What is the main reason for the decline in the 45-64 population?
The decline is due to the aging of the population, with younger boomers moving into retirement age and older Gen X cohorts filling in behind them. Additionally, aggressive internal migration, high costs of living, and housing shortages in the Northeast and West are driving this experienced cohort southward.
How does this decline affect the US economy?
The decline could lead to fewer experienced workers, caregivers, and civic leaders, which could impact the economy and communities. The 45-64 demographic typically represents peak earners who anchor municipal tax bases and possess decades of institutional knowledge.
What is the impact on the younger population?
The decline in the 45-64 population could lead to fewer experienced adults to mentor younger workers and care for the fast-growing population behind them. This could have long-term effects on the development and growth of the younger population.
How does the US compare to other countries in terms of aging population?
The US is not alone in facing an aging population. Other wealthy countries are also experiencing slower workforce growth and rising pressure on public budgets due to aging populations.
What are the potential consequences for local communities?
The decline in the 45-64 population could lead to a loss of experienced leaders and caregivers in local communities, which could impact the provision of services and the overall well-being of community members.
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