This workshop seeks to encourage interdisciplinary thinking about the relationship between social theory and Web Science. We aim to explore what social theory offers to Web Science and to examine the theoretical collaborations and innovations that might emerge in this context. In doing so we will consider some of the wider economic, political and sociological questions associated with this endeavour. The core questions for the workshop will be: What kinds of social theories are useful for Web Science? What are the consequences of social theory for the development of Web Science as a discipline?