OPENMIN brings together a consortium of researchers and technological experts from six countries (Austria, Belgium, France, Poland, Romania and Switzerland) that will collaborate to consolidate and expand a range of Open Science and Open Data initiatives that foster comparative knowledge generation and research capacities on Ethnic and Migrant Minorities and Migration Studies in Europe. The project will build on existing collaborations and cross-fertilising initiatives of Open Science that have been supported by a combination of national and EU-level programmes with the aim of generating European-wide infrastructures that make research and data focusing on Ethnic and Migrant Minorities and on Migration findable, accessible, interoperable and reusable (FAIR). OPENMIN will consolidate and expand the following FAIR tools: (1) the Ethnic and Migrant Minorities Survey Registry, (2) the Ethnic and Migrant Minorities Question Data Bank, (3) the Ethnic and Migrant Minorities Post-Harmonized Survey Data Bank, (4) the Nccr On the Move Migration-Mobility Survey data analysis and reuse tools, and (5) the IMISCOE Migration Research Hub. It will also allow for cross-national learning and tool development through the conception and/or generation of new Open Science and Open Data infrastructure tools and resources: (1) a prototype for a new Ethnic and Migrant Minorities Qualitative Study Registry, (2) a self-depositing Ethnic and Migrant Minorities Open Data Repository, (3) a metadata collection on surveys conducted with Ukrainian migrants and refugees, and (4) the prototype for an Ethnic and Migrant Minorities Survey Data Playground. In so doing, OPENMIN will contribute to the Open Science and Open Data strategic agenda for one of the core areas of interdisciplinary and multidisciplinary research in the social sciences and the humanities in Europe: the field of studies on Ethnic and Migrant Minorities and on Migration more generally.