The proliferation of smart devices, mobile applications, and IoT systems in our daily lives has created significant opportunities for a more efficient, productive, healthy, and sustainable society centered in short and long term human needs. To translate those opportunities into reality, we have seen increasing research attention from a number of disciplines. As human activity, behavior, and user experience become important factors in smart services and mobile applications, the research will bring a new focus on human-centered sensing, networking, and systems. The HumanSys workshop is intended to bring together researchers, developers, and practitioners in related fields from academia, industry, and service providers, to share idea and experience related to human-centered technologies and applications. We are also interested in work that tries to understand the implications of human and user-centered focus on system design. For example, traditional hardware or software optimizations in memory, speed, and form-factor may no longer be sufficient for a system to be successful.