To address both persistent and emerging social and environmental problems, governments around the world have been seeking innovative ways to generate policy solutions in collaboration with citizens. One prominent trend during recent decades is the proliferation of Policy Innovation Labs (PILs), in which the search for policy solutions is embedded within scientific laboratory-like structures. Spread across the public, private, and non-profit sectors, and often funded by local, regional, or national governments, PILs utilize experimental methods, testing, and measurement to generate innovative, evidence-based policy solutions to complex public issues. This catalog lists PILs in Europe. For each lab, a one-page profile specifies its vision, policy innovation approaches, methodologies, major projects, parent entity, funding sources, and its alignment with the United Nations Sustainable Development Goals (SDG) call to action. For each lab we identify governmental, municipal, multi-sectorial, academic, non-profit, or private sector affiliation. The goals of compiling this catalog and making it available to citizens, scholars, NGOs, and public officials are to call attention to the growing spirit of citizen engagement in developing innovative policy solutions for their own communities and to facilitate collaboration and cross-pollination of ideas between organizations. Despite their increasing importance in public policy making, PILs are as yet understudied. This catalog will provide an opportunity for scholars to explore the function and value of community-oriented policy innovation as well as the effects of approaching policy making around disruptive social problems in a “scientific” way.