This report is a summary of the views and suggestions expressed by attendees at the workshop on “Advocacy in Science,” held in Washington, DC on October 17-18, 2011. An earlier draft was reviewed by the participants, and their comments and suggestions were considered in preparing this final report. However, AAAS project staff retains full responsibility for the content of the report. As a summary, the report is not intended to be inclusive of all distinct comments made at the workshop or in reviews of earlier drafts. Neither is it offered as a definitive statement on the issues it covers. The subject matter on which it focuses is complex, nuanced and, in some quarters, contentious, and readers are encouraged to supplement their reading of this report with other resources, some of which can be found on the AAAS web site.