Madrid Open Data Portal
This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.
How this atlas is made · What “last verified” means · What “source-checked” means
The City of Madrid launched its open-data portal, datos.madrid.es, in March 2014 with 74 datasets. It has since grown to roughly 670 datasets and over 10,500 downloadable files — among Spain's largest municipal catalogues — including real-time feeds such as traffic and air quality, published for free reuse under the city's open-data terms. A February 2026 redesign rebuilt it on the open-source CKAN platform with API access.
what does this mean?
The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →Sources
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📎 Cite this project
1001 Smart Cities (2026). “Madrid Open Data Portal” — Madrid, Spain. The Smart City Atlas. https://1001smartcities.org/projects/madrid-open-data/ (last verified 2026-07-25). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.