Sport has become a global phenomenon and an activity that plays an important role in social and economic life. Effective and efficient management, which implies the rational use of available resources, is key to successful achievement of sporting as well as any other goals of a sport organisation. Today, sport organisations, regardless of whether they are private companies or public associations, are expected to operate in a responsible manner and contribute to the development of the local and wider community. Sport management is becoming increasingly complex due to a number of factors. In particular, technological progress has greatly shaped its development in recent decades. While offering many opportunities, it also presents a great challenge for sport managers. With this in mind, the main aim of the thesis is to explore and offer a deeper insight into various aspects of the application of ICT in the management of sport organisations. The thesis seeks to determine the level of implementation of ICT in the management of national sport federations and clubs, and the extent to which it helps managers in their work. The research also examines the IT competencies of sport officials, their perception of the role of ICT, and the challenges facing them in integrating modern technologies into management practices. In addition, an analysis is conducted of differences in the attitudes and perceptions of sport managers according to their socio-demographic characteristics and characteristics of the organisations in which they work. To collect data, an online survey has been carried out using a sample drawn from managers in national Olympic sport federations and clubs in Croatia. The results indicate that sport officials assess their level of use of ICT as satisfactory and consider that they have very good basic knowledge and skills in this area, but not advanced IT competencies. Furthermore, the survey found that, despite relying heavily on ICT in their work, there are areas where its potential has not been fully exploited. One of the conclusions of the study is that people in management positions in Croatian sport organisations believe that ICT is essential for effective management and has an important role in performing managerial functions and activities. The results of the analysis also support the hypothesis that there are some barriers to integrating ICT into the management of Croatian sport organisations. Mostly no significant differences were found in the responses of sport managers according to their sociodemographic characteristics and characteristics of the organisations in which they work.However, several factors have been found to influence some of the respondents' attitudes and perceptions. Although the survey results reveal that there are some problems and weaknesses, such as the fact that very few organisations have IT support, based on the results it can be concluded that the progress of implementation of ICT in the management of Croatian sport federations and clubs is satisfactory. However, this does not mean that there is no need for improvements in the process of implementation and application of ICT in the management of national sport federations and clubs in Croatia. Quite the contrary, the use of ICT in sport management needs to be continuously promoted and supported. Given the rapid technological progress and dynamic changes in sport, the issues addressed in this thesis warrant further research.