This book constitutes the refereed proceedings of the 7th IFIP WG 8.5 International Conference on Electronic Participation, ePart 2015, held in Thessaloniki, Greece, in August/September 2015. The 12 revised full papers presented were carefully reviewed and selected from 19 submissions. The papers have been organized in the following topical sections: eParticipation and social media, delibration and consultation, evaluation, and policy formulation and modelling.