Tourism is one of the most developed economic branches in Istria. Along with sun and sea tourism, wine tourism has been increasingly developing in the county. Wine is an important part of the tourist offer, and the potential in investment and further development of enotourism has become more prominent. In addition to the existing resources for this form of selective tourism, winemakers are increasingly investing in their own products and tasting rooms in order to present what they offer in the best possible way. In accordance with the increasing development of wine tourism, winemakers are investing in the quality of wine offer, and in this way Istria is becoming one of the leading wine destinations in Croatia. The topic of this thesis is the quality of wine selection as a catalyst for the development of wine tourism, and the thesis aims to investigate the extent to which the increase in the quality, distribution and recognition of Istrian wines impacts the development of wine tourism in Istria County. For the purpose of this thesis, in-depth interviews were conducted with the directors of selected tourist boards and winemakers located in the area covered by the selected tourist boards. The research showed that the quality of wine selection, the distribution of wine in all Croatian counties and beyond the country's borders, as well as wine events remarkably influence the growing development of wine tourism in Istria.