This master thesis analyses the possibilities of sustainable development of tourism based on natural resources in Sisak-Moslavina county. Tourism is the most widespread globally, and the most complex set of activities which has a great ability to influence the economic growth of the area in which it develops. Sisak-Moslavina county, despite its favorable eographical position and wealth of natural and athropogenic resources, is still not sufficiently developed for tourism. Diverse and preserved landscape, protected natural areas, sources of healing thermal water, rich flora and fauna, wine roads and many cycling routes create the potential for the development of special interest tourism based on natural resources with emphasized sustainability. In this master thesis, after a theoretical overview of sustainable tourism development, an overview of basic information on Sisak - Moslavina county will be given, and the current state of tourism development in this area will be analyzed with a detailed analysis of the level of development of specific forms of tourism based on natural resources in this county. In order to determine the recognizability of the tourist offer based on the natural resources of this County, a primary survey will be conducted using the method of an online survey questionnaire among the local population. After the analysis of the obtained results, and taking into account the SWOT analysis of the possibilities of developing sustainable tourism in the Sisak-Moslavina county based on natural resources, an overview of guidelines and proposals on how to achieve this will be given.