U.S. Census Bureau

US Census Bureau — U.S. statistics

The U.S. Census Bureau — the American equivalent of Poland's GUS. Its REST API exposes U.S. demographic and economic data (the census, ACS, business data). Requires a free API key.

Official source USA free key REST/JSON
GET api.census.gov/data/{year}/{dataset}?get={variables}&for={geography}&key={key}

Verified 2026-08

See documentation →

About this API

The U.S. Census Bureau is the American statistics office, running the decennial census and many surveys (the American Community Survey, business data). Its REST API exposes this data by API key — analogous to what Destatis is for Germany or IBGE for Brazil.

Frequently asked questions

Do I need an API key?

Yes — it requires a free API key (free request on census.gov).

What data does this API return?

U.S. demographic and economic data — the census, ACS, business data — by variables and geographies.

Can this API be called directly from a browser?

Not easily — key/registration-based authentication requires a server-side call and is not suitable for frontend code visible to visitors (which is why there is no live "Try it" button here).

Who runs this API?

The U.S. Census Bureau. Documentation: census.gov/data/developers.

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