The Second International Conference on e-Democracy & e-Government (ICEDEG 2015) addresses the main issues of web-based knowledge management for society and science. It covers technical and non-technical aspects of eSociety, eGovernance, eParticipation, eDemocracy, eGovernment and eHealth, among others. Research papers as well as case studies are of interest in the following areas (but are not limited to): eGovernment Big Data for eGovernment Cloud Computing for eGovernment Cloud Services for eGovernment ​eAdministration eAssistance eGovernment Architecture eProcurement eServices eSettlement Geographical information systems (GIS) Green Government Mobile Government Mobile Public Services Open Government Open Data Open source solutions for eGovernment Public Websites Policy Issues Security, Privacy and Ethics for eGovernment Semantic Web and Ontologies Smart Government eDemocracy eParticipation eSociety eHealth eGovernance