Sources: U.S. Census Bureau, Population Estimates Program (PEP). Updated annually. Population and Housing Unit Estimates

U.S. Census Bureau, American Community Survey (ACS). Updated annually. American Community Survey


Population Estimates Program

Age estimates of the population are produced for the United States, states, and counties, as well as for the Commonwealth of Puerto Rico and its municipios (county-equivalents for Puerto Rico). Because age is a critical element in determining federal funding, it is imperative to have high quality age data.

For more information, go to Age and Sex

American Community Survey

Age estimates of the population are produced for places, zona urbanas and comunidades (place-equivalents for Puerto Rico), and minor civil divisions.

Data on age are used to determine the applicability of other questions for a particular individual and to classify other characteristics in tabulations. Age data are needed to interpret most social and economic characteristics used to plan and analyze programs and policies.

For more information, go to ACS subject definitions "Age"

Data users should be aware of methodology differences that may exist between different data sources.

Methodology for U.S. and Puerto Rico