Electronic government and electronic participation continue to transform the public sector and society worldwide and are constantly being transformed themselves by emerging information and communication technologies.This book presents papers from the 14th International Federation for Information Processing's EGOV conference (IFIP EGOV 2015), and its sister conference, the 7th Electronic Participation (ePart) conference, held in Thessaloniki, Greece, in August and September 2015 with the support and sponsorship of the University of Macedonia. Through the years, both of these conferences have established themselves as leading scientific events in their field, providing a forum for scholars to present and discuss their work. Included here are 31 accepted ongoing research papers, grouped under the following headings: eParticipation; policy modeling; open government and smart cities; general e-government; and e-government services; as well as 6 Ph.D. colloquium papers, 5 accepted posters and 3 workshops.With their combination of scientific credibility and rigor and with high relevance to practice, the papers presented here will be of interest to all those whose work involves electronic government and electronic participation.