Population Estimates APIs

Population Estimates APIs

May 08, 2025

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.

Related Information: Population Estimates Categorical Variables

All data queries to the Census Data API now require an API key. Please cut and paste the Example Calls below into your web browser and replace YOUR_KEY_GOES_HERE with your personal API Key.

If you do not have an API Key, request one here. For more information: Watch Video.

Vintage 2013

US, State, and PR Total Population and Components of Change

API Call: api.census.gov/data/2013/pep/natstprc
Examples and Supported Geographies: api.census.gov/data/2013/pep/natstprc.html
Variables: api.census.gov/data/2013/pep/natstprc/variables.html
Example Call: July 1, 2013 Net Domestic Migration Estimate for Alaska

api.census.gov/data/2013/pep/natstprc?get=DOM&for=state:02&DATE=6&key=YOUR_KEY_GOES_HERE

US, State, and PR Population Age 18+

API Call: api.census.gov/data/2013/pep/natstprc18
Examples and Supported Geographies: api.census.gov/data/2013/pep/natstprc18.html
Variables: api.census.gov/data/2013/pep/natstprc18/variables.html
Example Call: Estimate population age 18+ for the US

api.census.gov/data/2013/pep/natstprc18?get=POPEST18PLUS2013&for=us&key=YOUR_KEY_GOES_HERE

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National Monthly Population Estimates by Single Year of Age , Sex, 5 Races, Hispanic Origin, and Universe

API Call: api.census.gov/data/2013/pep/monthlynatchar5
Examples and Supported Geographies: api.census.gov/data/2013/pep/monthlynatchar5.html
Variables: api.census.gov/data/2013/pep/monthlynatchar5/variables.html
Example Call: Estimate population by age, sex, race and Hispanic origin for all dates for US

api.census.gov/data/2013/pep/monthlynatchar5?get=AGE,SEX,DATE,RACE5,HISP,POP,UNIVERSE&key=YOUR_KEY_GOES_HERE

National Monthly Population Estimates by Single Year of Age, Sex, 6 Races, Hispanic Origin, and Universe

API Call: api.census.gov/data/2013/pep/monthlynatchar6
Examples and Supported Geographies: api.census.gov/data/2013/pep/monthlynatchar6.html
Variables: api.census.gov/data/2013/pep/monthlynatchar6/variables.html
Example Call:

api.census.gov/data/2013/pep/monthlynatchar6?get=AGE,SEX,DATE,HISP,RACE6,POP,UNIVERSE&key=YOUR_KEY_GOES_HERE

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Housing Unit Estimates for US, States, and Counties

API Call: api.census.gov/data/2013/pep/housing
Examples and Supported Geographies: api.census.gov/data/2013/pep/housing.html
Variables: api.census.gov/data/2013/pep/housing/variables.html
Example Call: Housing estimate for the Petersburg census area, Alaska for all dates

api.census.gov/data/2013/pep/housing?get=DATE,STNAME,CTYNAME,HUEST&for=county:195&in=state:02&key=YOUR_KEY_GOES_HERE

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County Total Population and Components of Change

API Call : api.census.gov/data/2013/pep/cty
Examples and Supported Geographies: api.census.gov/data/2013/pep/cty.html
Variables: api.census.gov/data/2013/pep/cty/variables.html
Example Call: Resident population total for all counties in Alabama for all estimate dates

api.census.gov/data/2013/pep/cty?get=POP,DATE&for=county:*&in=state:01&key=YOUR_KEY_GOES_HERE

County Population Estimates by 5 Year Age Groups, Sex, 5 Races, and Hispanic Origin

API Call: api.census.gov/data/2013/pep/cochar5
Examples and Supported Geographies: api.census.gov/data/2013/pep/cochar5.html
Variables: api.census.gov/data/2013/pep/cochar5/variables.html
Example Call: Estimate population for Autauga County Alabama by age group for all dates

api.census.gov/data/2013/pep/cochar5?get=AGEGRP,RACE5,HISP,SEX,DATE,STNAME,CTYNAME,POP&for=county:001&in=state:01&key=YOUR_KEY_GOES_HERE

County Population Estimates by 5 Year Age Groups, Sex, 6 Races, and Hispanic Origin

API Call: api.census.gov/data/2013/pep/cochar6
Examples and Supported Geographies: api.census.gov/data/2013/pep/cochar6.html
Variables: api.census.gov/data/2013/pep/cochar6/variables.html
Example Call: Estimate population for Autauga County Alabama by age group for all dates

api.census.gov/data/2013/pep/cochar6?get=AGEGRP,RACE6,HISP,SEX,DATE,STNAME,CTYNAME,POP&for=county:001&in=state:01&key=YOUR_KEY_GOES_HERE

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Puerto Rico Municipios Total Population

API Call: api.census.gov/data/2013/pep/prm
Examples and Supported Geographies: api.census.gov/data/2013/pep/prm.html
Variables: api.census.gov/data/2013/pep/prm/variables.html
Example Call: Estimate population in Adjuntas Municipio in Puerto Rico for all dates

api.census.gov/data/2013/pep/prm?get=POP,DATE&for=county:001&in=state:72&key=YOUR_KEY_GOES_HERE

Puerto Rico Commonwealth Estimates by Single Year of Age and Sex

API Call: api.census.gov/data/2013/pep/prcagesex
Examples and Supported Geographies: api.census.gov/data/2013/pep/prcagesex.html
Variables: api.census.gov/data/2013/pep/prcagesex/variables.html
Example Call: Estimate population by age, and sex of Puerto Rico for all dates

api.census.gov/data/2013/pep/prcagesex?get=AGE,SEX,STNAME,DATE,POP&for=state:*&key=YOUR_KEY_GOES_HERE

Puerto Rico Municipios Estimates by 5-Year Age Groups and Sex

API Call: /api.census.gov/data/2013/pep/prmagesex
Examples and Supported Geographies: api.census.gov/data/2013/pep/prmagesex.html
Variables: api.census.gov/data/2013/pep/prmagesex/variables.html
Example Call: Population for all dates by 5 year age group and sex for all Municipios in Puerto Rico

api.census.gov/data/2013/pep/prmagesex?get=AGEGRP,SEX,DATE,STNAME,CTYNAME,POP&for=county:*&in=state:72&key=YOUR_KEY_GOES_HERE

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Subcounty Population Places and MCDs

API Call: api.census.gov/data/2013/pep/subcty
Examples and Supported Geographies: api.census.gov/data/2013/pep/subcty.html
Variables: api.census.gov/data/2013/pep/subcty/variables.html
Example Call: Estimate Population for all dates in Autaugaville town, Alabama

api.census.gov/data/2013/pep/subcty?get=NAME,STNAME,POP,DATE,CTYNAME&for=place:03220&in=state:01+county:001&key=YOUR_KEY_GOES_HERE

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State Population Estimates by Single Year of Age, Sex, 5 Races, and Hispanic Origin

API Call: api.census.gov/data/2013/pep/stchar5
Examples and Supported Geographies: api.census.gov/data/2013/pep/stchar5.html
Variables: api.census.gov/data/2013/pep/stchar5/variables.html
Example Call: Estimate population for all dates by age, sex, race, ethnicity for all States

api.census.gov/data/2013/pep/stchar5?get=AGE,SEX,DATE,STNAME,RACE5,HISP,POP&for=state:*&key=YOUR_KEY_GOES_HERE

State Population Estimates by Single Year of Age, Sex, 6 Races, and Hispanic Origin

API Call: api.census.gov/data/2013/pep/stchar6
Examples and Supported Geographies: api.census.gov/data/2013/pep/stchar6.html
Variables: api.census.gov/data/2013/pep/stchar6/variables.html
Example Call: estimate population of all counties in all states for all dates

api.census.gov/data/2013/pep/stchar6?get=AGE,HISP,RACE6,SEX,DATE,STNAME,POP&for=state:*&key=YOUR_KEY_GOES_HERE

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Related Information

Page Last Revised - May 20, 2026

Population Estimates APIs

Population Estimates APIs

Vintage 2013

United States, States, and Puerto Rico

US, State, and PR Total Population and Components of Change

US, State, and PR Population Age 18+

National

National Monthly Population Estimates by Single Year of Age , Sex, 5 Races, Hispanic Origin, and Universe

National Monthly Population Estimates by Single Year of Age, Sex, 6 Races, Hispanic Origin, and Universe

Housing Units

Housing Unit Estimates for US, States, and Counties

County

County Total Population and Components of Change

County Population Estimates by 5 Year Age Groups, Sex, 5 Races, and Hispanic Origin

County Population Estimates by 5 Year Age Groups, Sex, 6 Races, and Hispanic Origin

Puerto Rico

Puerto Rico Municipios Total Population

Puerto Rico Commonwealth Estimates by Single Year of Age and Sex

Puerto Rico Municipios Estimates by 5-Year Age Groups and Sex

Subcounty

Subcounty Population Places and MCDs

State

State Population Estimates by Single Year of Age, Sex, 5 Races, and Hispanic Origin

State Population Estimates by Single Year of Age, Sex, 6 Races, and Hispanic Origin

Related Information