The Census Bureau's Population Estimates Program produces estimates of the population for the United States, its states, counties, cities and towns, as well as for the Commonwealth of Puerto Rico and its municipios. Demographic components of population change (births, deaths, and migration) and demographic characteristics (age, sex, race, and Hispanic origin) are produced at the national, state, county, Puerto Rico Commonwealth and muncipio levels of geography. In addition, housing unit estimates are produced for the nation, states, and counties.
Each year, the Population Estimates Program utilizes current data on births, deaths, and migration to calculate population change since the most recent decennial census, and produces a time series of estimates of population. The annual time series of estimates begins with the most recent decennial census data and extends to the vintage year. The vintage year (e.g., V2013) refers to the final year of the time series. The reference date for all estimates is July 1, unless otherwise specified.
With each new issue of estimates, the Census Bureau revises estimates for years back to the last census. 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.
These estimates are used in federal funding allocations, as denominators for vital rates and per capita time series, as survey controls, and in monitoring recent demographic changes. Although the American Community Survey also produces population, demographic, and housing unit estimates, it is the Population Estimates Program that produces and disseminates the official estimates of the population for the nation, states, counties, cities and towns, and estimates of housing units for states and counties.
Vintage 2013 estimates will be released on American FactFinder on a flow basis in 2013-2014. The following is a tentative schedule for these releases: