Chapter 2 of my favorite textbook has a table showing various propositions about which economists largely agree. It is based on the published results from several surveys. A new project by the IGM Forum is now regularly polling a diverse group of top economists on a variety of policy-related questions. It is a good way to see whether a professional consensus exists. You can follow the project by clicking here
If you are curious, I declined being a member of the panel, mainly because time is scarce. Moreover, I have various other ways to let my opinions be known.