The European Conference on Computer-Supported Cooperative Work is an international venue on practice-centred computing and the design of cooperation technologies. It is a series of conferences on computer-supported cooperative work located in Europe that was established in 1989. The 19th edition of ECSCW will take place online via remote channels and in Zurich, Switzerland, from 7th to 11th June 2021. Remote participation is available for everyone. The organizers are looking into options for a hybrid conference.