The four-volume set LNCS 1174611749 constitutes the proceedings of the 17th IFIP TC 13 International Conference on Human-Computer Interaction, INTERACT 2019, held in Paphos, Cyprus, in September 2019. The total of 111 full papers presented together with 55 short papers and 48 other papers in these books was carefully reviewed and selected from 385 submissions. The contributions are organized in topical sections named: Part I: accessibility design principles assistive technology for cognition and neurodevelopment disorders assistive technology for mobility and rehabilitation assistive technology for visually impaired co-design and design methods crowdsourcing and collaborative work cyber security and e-voting systems design methods design principles for safety/critical systems. Part II: e-commerce education and HCI curriculum I education and HCI curriculum II eye-gaze interaction games and gamification human-robot interaction and 3D interaction information visualization information visualization and augmented reality interaction design for culture and development I. Part III: interaction design for culture and development II interaction design for culture and development III interaction in public spaces interaction techniques for writing and drawing methods for user studies mobile HCI personalization and recommender systems pointing, touch, gesture and speech-based interaction techniques social networks and social media interaction. Part IV: user modelling and user studies user experience users emotions, feelings and perception virtual and augmented reality I virtual and augmented reality II wearable and tangible interaction courses demonstrations and installations industry case studies interactive posters panels workshops.