U.S. population, age and household statistics
Population counts and estimates describe people. Household statistics describe occupied homes. Keeping those units separate makes a community profile easier to interpret.
Who lives here, and how are households changing?
Age, households, nativity, and annual population history are integrated. Detailed migration histories and demographic cross-tabulations are outside this release.
| Measure | United States | Who is counted / uncertainty |
|---|---|---|
| Resident population July 1, 2025 · people · PEP · annual estimate | 341,784,857 MOE not published | Resident population People whose usual residence is in the area on July 1, 2025. |
| Median age 2020–2024 · years · B01002 · median | 38.9 ± 0.1 (90% MOE) | Total population The age dividing the total population into two equal groups. |
| Households 2020–2024 · households · B11001 · count | 129,227,496 ± 209,365 (90% MOE) | Households Occupied housing units, including people living alone and unrelated people living together. |
| Average household size 2020–2024 · people per household · B25010 · mean | 2.53 ± 0.01 (90% MOE) | Occupied housing units Average people per occupied housing unit, using the source household population. |
| Children under 18 2020–2024 · percent · B01001 · percentage | 22.0% Derived MOE not calculated | Total population Numerator: 73,517,834. Denominator: 334,922,499. |
| Residents age 65 and older 2020–2024 · percent · B01001 · percentage | 17.2% Derived MOE not calculated | Total population Numerator: 57,633,628. Denominator: 334,922,499. |
| Foreign-born residents 2020–2024 · percent · B05002 · percentage | 14.1% Derived MOE not calculated | Total population Numerator: 47,349,078. Denominator: 334,922,499. |
Questions and related measures
Dates, comparisons, and limits
Annual population estimates refer to July 1. ACS age, nativity and household estimates describe 2020–2024. The two products do not represent the same date or population universe.
National, state and county estimates come from the same selected ACS five-year product. A five-year estimate describes the entire 2020–2024 period. It is not an annual observation for 2024, and it should not be described as a current-month statistic. Direct source estimates retain their published margins of error.
For derived percentages, inspect the source counts and denominator. This release retains source component uncertainty but does not calculate a derived margin of error or test whether a difference is statistically meaningful. A descriptive difference does not establish cause or a policy effect.
Historical and geographic context
The annual resident population series uses a single PEP Vintage 2025 release. Other integrated measures use one ACS period; historical ACS trends have not been integrated. County boundaries do not stand in for cities, institution attendance areas or service regions. The coverage page identifies the geographic scope and unavailable products.