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).