This book constitutes the thoroughly refereed post-workshop proceedings of the 16th International Conference on Web Engineering, ICWE 2016, held in Lugano, Switzerland, in June 2016.The 15 revised full papers together with 5 short papers were selected form 37 submissions. The workshops complement the main conference, and provide a forum for researchers and practitioners to discuss emerging topics. As a result, the workshop committee accepted six workshops, of which the following four contributed papers to this volume:2nd International Workshop on TEchnical and LEgal aspects of data pRIvacy and SEcurity (TELERISE 2016)2nd International Workshop on Mining the Social Web (SoWeMine 2016)1st International Workshop on Liquid Multi-Device Software for the Web (LiquidWS 2016)5th Workshop on Distributed User Interfaces: Distributing Interactions (DUI 2016)