Sustainable transformations in Croatian tourism are a necessity for the preservation of natural and cultural resources, and for achieving long-term sustainability. This concept implies balancing the economic, ecological and social dimensions of tourism, where it is crucial to ensure that the development of tourism does not endanger future generations. Croatian tourism, which faces challenges such as mass tourism and overexploitation of resources, must implement sustainability strategies to ensure long-term profitability and environmental protection. At the center of this transformation is the local community, which plays a crucial role in creating sustainable tourism models. Their involvement in the process of planning and implementation is very important because the joint efforts of all stakeholders can achieve harmony between tourism development and resource conservation. Current global trends in tourism, such as the growing demand for authentic experiences, ecotourism and responsible travel, provide Croatia with an opportunity to diversify its tourism offer. Diversification includes the development of new, less developed regions and the improvement of infrastructure that will enable the sustainable management of an increasing number of visitors. Research was conducted on a sample of 22 companies in Croatia (hoteliers and tour operators), with the aim of analyzing their cooperation with the local community, economic and social impacts, and sustainable transformations in tourism. The questionnaire contained 17 questions, and the results were based on the respondents' answers. The results show that the majority of respondents rate their cooperation with the local community as high, although there is a discrepancy between what tourist organizations consider sufficient cooperation and the actual expectations of the community. The most common forms of cooperation include the promotion of local heritage (31.8%). Lack of investment in local infrastructure and challenges such as different priorities are obstacles to successful cooperation. It was concluded that there is an awareness of the importance of sustainable transformations, but additional measures, education and better cooperation are needed in order to improve the sustainable development of tourism in Croatia.