The Third International Workshop on Sensors and Smart Cities (SSC 2017) will be held May 29, 2017 in Hong Kong, China in conjunction with the Third IEEE International Conference on Smart Computing. The workshop aims to bring together developments related to sensors and smart cities, including computing and sensing infrastructures, communication technologies, data processing, and applications. Topics of interest include cost, adaptability, self-learning, deployment, maintenance, smart user experiences, and overcoming adoption barriers. Authors are invited to submit papers no longer than 6 pages by March 15, 2017 for peer review and possible inclusion in the proceedings.