The population changes constantly due to births, deaths, and migration in and out of the state, but the Census is only conducted once every ten years. Therefore, OSAP needs to update population data. The population is estimated every year after the Census (the "post-censal" years), and these estimates are called, "post-censal" estimates.
OSAP currently uses 4 main sources for post-censal population estimates:
- The U.S. Census Bureau Population Estimates Program
- The National Center for Health Statistics (NCHS) Bridged-Race file
- The U.S. Census Bureau American Community Survey (ACS) Estimates
- Vintage Files
Most recent population information
These data are from the National Center for Health Statistics. Postcensal estimates of the resident population of the United States for July 1, 2010-July 1, 2016, by year, county, single-year of age (0, 1, 2, .., 85 years and over), bridged race, Hispanic origin, and sex (Vintage 2016):