Census Estimates Show an Older U.S. as South Gains Residents

The United States is getting older, even as the South continues to add residents across every tracked age group, according to final Vintage 2025 estimates from the U.S. Census Bureau.

The bureau released the estimates on June 25, 2026. They put the nation’s median age at 39.4 in July 2025, up from 39.2 in July 2024 and 38.6 in April 2020.

These figures are estimates, not a new decennial census enumeration or an exact head count of every resident. The Census Bureau’s Population Estimates Program uses the 2020 Census base along with current information on births, deaths and migration to produce an annual time series.

The national age picture is shifting upward

From April 1, 2020, to July 1, 2025, the population age 65 and older grew 16.2%, the largest increase among the five age groups highlighted in the Census analysis.

The population ages 25 to 44 increased 5.9%, while the population ages 18 to 24 grew 2.1%. At the same time, the population ages 45 to 64 declined 3.2%, and the under-18 population fell 2.4%.

That combination changes the balance of services communities may need to plan for. A larger older population can increase demand for health care, accessible housing and senior services, while changes among children and working-age adults affect school enrollment, hiring and household formation. The estimates show demographic change; they do not predict exactly how any particular local system will respond.

Why the South stands out

The South was the only Census region where all five tracked age groups increased between 2020 and 2025.

The region’s total population grew 6.0%, nearly twice the national rate of 3.1%. Its under-18 population increased 1.1%; residents ages 18 to 24 rose 5.0%; the population ages 25 to 44 grew 9.0%; ages 45 to 64 increased 0.1%; and the population age 65 and older grew 17.5%.

The pattern is broader than a single retiree or young-worker story. The South added children, working-age adults and older adults at the same time. The Census Bureau says migration and fertility patterns are among the factors changing regional age structures. The data do not establish that one policy, industry or migration stream caused the South’s growth.

Much of the growth is on metropolitan edges

Southern metropolitan counties grew 6.7% from 2020 to 2025. Outlying metro counties were the fastest-growing county type in the region.

The Census Bureau says those outlying counties appear to be attracting or retaining residents, likely through some combination of both. That geography matters because communities on metropolitan edges may need to expand classrooms, roads, water systems, housing and emergency services while also serving a growing older population.

The practical effects will vary by place. Rising child populations can increase school-planning needs. Growth among older adults can raise demand for medical care, accessible housing, home-based services and transportation options. Employers may gain more working-age residents in some areas, but local governments may also face pressure to expand infrastructure and tax-supported services.

Migration is part of the wider national context

In a separate January 27, 2026 release, the Census Bureau said U.S. population growth slowed between July 2024 and July 2025 as net international migration fell from 2.7 million to 1.3 million. The bureau reported that the nation added about 1.8 million residents, or 0.5%, during that period, reaching 341.8 million.

The January release is related context, but it is not the same as the June 25 age-and-county analysis. The Census Bureau identifies migration and fertility patterns as demographic factors; the Associated Press separately characterized the national slowdown as connected in part to the Trump administration’s immigration policies. That interpretation should be treated as AP’s attribution, not as a causal conclusion established by the age estimates themselves.

How to read the numbers

Vintage 2025 is the most recent completed and internally consistent set of Census estimates. It incorporates the 2020 Census by full demographic detail into the April 1, 2020, estimates base.

The Census Bureau revises the entire annual time series with each new vintage, and older vintages are superseded. Because methods can change, year-to-year comparisons should be made within the same vintage rather than mixing figures from different releases.

The clearest takeaway is the combination of two trends: the country’s median age continues to rise, and the South is absorbing growth across every tracked age group. Those patterns provide a useful baseline for understanding debates over school planning, hiring, health care, housing, roads and local government capacity, while leaving room for future revisions to the estimates.

Sources

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