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Resource Library
Population Estimates APIs
Each year, the Census Bureau's Population Estimates Program uses 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, 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.
Population Estimates
- API Call: api.census.gov/data/2021/pep/population
- Examples and Supported Geographies: api.census.gov/data/2021/pep/population.html
- Variables: api.census.gov/data/2021/pep/population/variables.html
- Example Call:
National Monthly Population Estimates
- API Call: api.census.gov/data/2021/pep/natmonthly
- Examples and Supported Geographies: api.census.gov/data/2021/pep/natmonthly.html
- Variables: api.census.gov/data/2021/pep/natmonthly/variables.html
- Example Call: Total population each month from January to December 2021
api.census.gov/data/2021/pep/natmonthly?get=POP,NAME,MONTHLY&for=us:*&MONTHLY=4&key=YOUR_KEY
Related Information
Population Estimates Categorical Variables 2021
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Population and Housing Unit Estimates
Produces estimates of the population for the United States, its states, counties, cities, and towns, as well as for the Commonwealth of Puerto Rico.
Page Last Revised - December 8, 2021
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