Energy regions are claimed to play a key role for the transition of the energy system. They are regional initiatives which usually envision energy self-sufficiency by using regional energy sources and building a decentralized energy infrastructure. This project analyzes and models energy transitions of two Austrian energy regions: ökoEnergieland, district Güssing and Energieregion Weiz-Gleisdorf. These regions were selected because they show significant differences in their initial conditions, applied strategies and tran-sition processes. Furthermore, in both regions efforts to foster a transition towards a sustainable energy region started in the 90ties, providing data as well as committed stakeholders for collaboration.