Croatia's geographical position and other natural beauties make Croatia an extremely attractive tourist destination. Following the above, it can be concluded that tourism in the Republic of Croatia contributes to the economic stability of the country, and the development and branding of individual destinations has a key effect on the attractiveness and economic results of overall tourism. Every year, number of tourist arrivals is increasing, so the demand for accommodation capacity has also increased. The subject of the thesis is focused on the sustainable development of a tourist destination based on the example of the County of Istria. Analyzing the concept of sustainable development of tourism with an emphasis on the Istrian County, it is evident that all the clusters of the Istrian County apply adequate strategies and regulations of a higher order, and actively advocate for the improvement of the sustainable development of tourism in the Istrian County, and the emphasis is placed on outdoor activities - the development of cycle tourism and bicycle paths, raising the level of awareness of the sustainable development of Istrian County as a tourist destination and the like. In addition to the collected secondary data (statistical data) about Istria County as a sustainable tourist destination, data was also collected based on a survey conducted using a Google Forms questionnaire on a sample of 100 respondents