Identidades comunes (Common identities), the first national meeting of citizen science (CS), social sciences and humanities (SSH), took place in Ethiopia, Art and Technology Centre, Zaragoza (Spain), on 23 September 2021. The meeting was co-organised by Ibercivis Foundation, the Zaragoza City Council and the University of Zaragoza, with the support of the Spanish Foundation for Science and Technology-Ministry of Science and Innovation and the Spain-USA Council Foundation. A second edition will be held on 20 September 2022. Identidades Comunes consisted of a knowledge exchange meeting between citizen science project managers, citizen and academic researchers, together with the citizenry at large, as well as a common space to discuss the present and future of citizen science in social sciences and humanities. Participants shared experiences and knowledge through presentations, round tables and workshops. The citizen science initiatives presented were developed in transdisciplinary fields around social sciences and humanities themes and/or methodologies, showing the relevance of social sciences and humanities research for planetary health: social perception of nursing; implications and forms of drought management; mental health; risk of social exclusion; social and citizen innovation; climate change; visibility of migration, and many others. In addition, workshops were held to learn more about some of these projects. Institutional support for Identidades Comunes was manifested in the participation of representatives from Government and Academia: the Regional Minister of Science, University and Knowledge Society of the Government of Aragon, the Regional Minister of Economy, Innovation and Employment of the City Council of Zaragoza and the Vice-Rector of Planning, Sustainability and Infrastructures of the University of Zaragoza. The main conclusions were as follows. From citizen laboratories and activism: affected communities will always be a key to citizen science; something that was considered revolutionary is now endorsed by European policies. a. From the governmental sphere: citizen science, still unknown to a large part of society, must be integrated into everyday life, and the value of research using citizen science methodologies must be recognised. From the academic community: certain research could not be developed without citizen science; universities must open up much more to society as a whole, highlighting the role of citizen science and SSH for the co-creation of open, democratic and innovative knowledge.