This book constitutes the refereed proceedings of the 5th IFIP International Working Conference on Knowledge Management in Electronic Government, KMGov 2004, held in Krems, Austria in May 2004. The 34 revised full papers presented were carefully reviewed and selected for publication. The papers are organized in topical sections on KM concepts and methodologies, strategies to implement KM in the public sector, knowledge ontologies and structuring concepts for public administration, technologies for KM support in public administrations, requirements engineering for KM, representing legal and procedural knowledge, KM support for democratic processes and citizen participation, and examples of KM in public administrations and case studies.