Madrid is the capital of Spain and one of the most important cities in the European Union. The current population is over 3 million, and the metropolitan area has more than 6 million inhabitants.
The city of Madrid relies on an open government strategy based on three tenets: Transparency, Open Data, and City Participation and Collaboration. The City Council aims at promoting transparency in the management of public resources; openness of data in an open format for reuse; and offering its inhabitants more opportunities to participate in public affairs and decision making to improve the management of the city.

In 2016, the city of Madrid was one of the first to join the Open Government Partnership as a local partner. Today, Madrid is implementing its second Action Plan, which includes commitments such as the creation of a Complaints Mailbox, a Government Commitments Supervisory Board, and Transparency in Waste Management, among others.
Since 2016, Madrid City Council has been relying on a Transparency Ordinance, which is being reformed to include improvements like ensuring that requests for information can be submitted anonymously. This is an important aspect, as it goes beyond national regulations and is in line with the provisions of the international standards on transparency.

Concerning public procurement, the City Council publishes on its web page all the necessary information on tender procedures. Madrid also relies on a City Office against Fraud and Corruption with powers to carry out inspections, investigation and prevention of potentially criminal or corrupt behaviours.

The representatives of Madrid City Council have collaborated proactively on the ACT! project since 2019. They have participated in all the scheduled meetings and workshops, explaining how the City Council works and its regulations, contributing with their experience to the discussions on the creation of the tools for this project.