This thesis raises the question under which conditions new information and communication tools (ICTs) can be used for supporting citizen participation in the regional development process of Agenda 21 and LEADER. Participation is a key factor to strengthen sustainable development in a region. Not only industries and society were influenced by new ICTs, but also the design of participation processes. The master thesis demonstrates the peculiarities of participation processes in the light of sustainable regional strategy formulation and prerequisites for designing e-Participation processes.Prerequisites mentioned by scientific papers were examined from an organizers perspective by carrying out interviews with project stakeholders, observing and participating in meetings as well as in a discussion on e-Participation tools and from a participants perspective including a questionnaire filled out by citizens in a case study in Upper Austria. On the other hand another online participation process in Styria served as best practice example to prove these prerequisites. Expert interviews were carried out to identify the dos and donts to improve next participation processes. Thus a set of important claims for e-participation processes was developed out of the information gained in these expert interviews.The results show that each participation process has its own characteristics and methods. It should be adapted to a regions properties, the intended aim as well as the participation issue and peoples lifestyles - there is no ultimate tool. E-Participation can make the process more transparent and guarantees a flow of information. However, the mediation of online tools by itself will not encourage citizens to participate, as further outreach methods are required. The participation issue should address peoples needs and concerns. The combination of online and offline methods will help to create a more inclusive process and will enable risk dispersion.