The open science and Wikimedia communities share the common goal of developing high quality openly available content, yet collaborations between the movements have been limited. This workshop will focus on building connections between the communities, and will begin with a brief introduction to open science, followed by a presentation of different barriers that exist for open science, and examples from different parts of the world. It will then provide a structure for looking at how Wikimedians can support the development of open science policies and practices. Finally, the workshop will discuss coordinated efforts for national and regional collaborations.