Each year, the Census Bureau's Population Estimates Program (PEP) utilizes current data on births, deaths, and migration to calculate population change since the most recent decennial census and produce a time series of estimates of population, demographic components of change, and housing units. The annual time series of estimates begins with the most recent decennial census data and extends to the vintage year.
As each vintage of estimates includes all years since the most recent decennial census, the latest vintage of data available supersedes all previously-produced estimates for those dates.
The following estimates are produced and released:
National, state, and county total resident population and demographic components of population change
National resident, household, resident plus Armed Forces overseas, civilian, and civilian noninstitutionalized populations by age, sex, race, and Hispanic origin
State and county resident population by age, sex, race, and Hispanic origin
Puerto Rico Commonwealth and municipio total resident population and demographic components of population change
Puerto Rico Commonwealth and municipio resident population by age and sex
Metropolitan and micropolitan statistical area total resident population and demographic components of population change (Note: metro and micro areas are composed of one or more whole counties or equivalent entities. Producing metro and micro area population estimates involves the aggregation of the appropriate county-level population estimates.)
City, town, and other subcounty area total resident population
National, state, and county housing units
For detailed information about the methods used to create the population estimates, see Methodology.