ONS API (Office for National Statistics)
FreeLiveLast verified 29 Sept 2026
UK official statistics and Census 2021 data: population, households, labour market and prices by area.
Example request
curl -s 'https://api.beta.ons.gov.uk/v1/datasets'
Free tier, in plain English
Open with no key. Rate limits of 200 requests a minute apply, and callers should send a descriptive User-Agent.
Alternatives in Census & Demographics
Agify.ioPredicts a likely age for a first name from statistics on roughly a billion people.FreemiumCensus.govUS Census Bureau demographic, economic and geographic data (ACS, decennial census, and more) by area.FreeData USAUS Census/government data — population, jobs, education, industry — queryable by state and year.FreeGenderize.ioPredicts likely gender for a first name using a database of over 1 billion people.FreemiumGENESIS-OnlineGermany's official statistics database covering economy, population and society via a REST/JSON web service.Free
All 11 Census & Demographics APIs →