BEA uses Census Bureau midyear (July 1) resident population estimates for states and counties to calculate per capita personal income estimates. Each new series of data (called vintages) incorporates the latest administrative record data, geographic boundaries, and methodology. Therefore, the entire time series of estimates beginning with the most recent decennial census is revised annually. When Census incorporates data from a new decennial census, it will complete a final revision to population estimates for the years before the new decennial census year to the previous decennial census year. For example, when Census incorporated data from the 2010 decennial census into the midyear resident population estimates, Census revised population data back to 2000, in order to align these years with the 2000 and 2010 decennial censuses.

The sum of BEA state population totals is less than the national population totals shown in BEA’s NIPA tables because the state population totals do not include military personnel stationed overseas.

For more information on Census Bureau midyear population estimates, please see Population and Housing Unit Estimates Tables.