Introduction. The paper considers the prerequisites for the formation and development of ecotourism, its infrastructure in Ukraine. The object of this study is to study the trends in the formation and development of infrastructure for ecotourism. The authors consider the current trends in the development of the ecotourism sector and its infrastructure, as one of the fundamental dimensions of sustainable development. Purpose. In the review of literature sources the definition of “ecotourism” and “infrastructure” is analyzed, the discussion questions raised by domestic and foreign scientists on the research topic, the experience of solving problematic issues are studied. A critical assessment of the intensification of ecotourism development is given in view of the existing contradictions in the definition of positive and negative factors. Among the research methods the authors used abstract-logical to study the genesis of basic concepts, knowledge of their essence and features; bibliographic for the study and development of scientific sources on the infrastructure of ecotourism, analysis and synthesis to identify cause-and-effect relationships and patterns, correlation for the study of infrastructure of ecotourism and determine the effectiveness. Results. The results of the study, calculated by regression analysis, show that the coefficient of determination R-square indicates a 92% relationship between the studied indicators. The coefficient of variable X1 (0.944) indicates the impact of the costs of tourism entities on the services of third parties used in the production of tourism products within the obtained model on the income from the provision of tourism services with a weight of 0.944. With the help of graphical analysis the final formula of linear regression, R-square, trend equation and efficiency of the studied regions of the country are considered. The growing dynamics of 2017-2019 in the number of tourism entities was noted. Conclusions. The practical significance of this study is that the results of this work can be used as a reference material for students of this topic, including businesses, scientists, educators and other stakeholders. Keywords: ecotourism; infrastructure; regression analysis; efficiency; conceptual approach.

The purpose of the article is to study the features of the development of the regions of Ukraine, the formation of a model of sustainable development of ecotourism. The bibliographic method made it possible to study the basic concepts,controversial and problematic issues, as well as the experience of solving them, proposed by scientists from different countries in this area of research. The analysis of efficiency has revealed the most competitive regions of Ukraine for conducting an environmentally oriented tourism business. The correlation and regression analysis results showed that the coefficient of determination R-square indicates a 94% correlation between the studied indicators. The growing dynamics of the number of subjects of tourist activity in Ukraine is noted. The primary data for cluster analysis were preliminarily formed, the presence of advantages and risks (anthropogenic effects) in 24 regions was determined, and promising directions for the development of ecotourism were identified. Cluster analysis, carried out using IBM SPSS software, determined the Euclidean distance and grouped the analyzed regions of Ukraine into clusters with the most similar characteristics. As a result of the study, the author’s vision of the essence of ecotourism, the logic of applying the methodology of cluster analysis was substantiated. The hypothesis about the influence of cultural heritage sites on the number of tourists was refuted. Some recommendations are given for further improvement of the quality of ecotourism development as a priority direction in the formation of sustainable development. The study’s practical significance lies in the fact that the results of the work carried out can be used as reference material for those studying the topic.