With the evolution of digital technologies, social networks have become an indispensable part of modern society and communication, and their influence on various aspects of life is continuously growing. As part of an individual's everyday life, social networks are an integral part of the population's life, as is sport itself, and are becoming an increasingly important tool for football clubs in building and maintaining the loyalty of their fans, regardless of geographical distance. Accordingly, this paper investigates the mentioned two sides; sport, through the development of sports marketing, and social networks as a medium through which it can be implemented. Sports businesses can increase fan loyalty and engagement by providing unique content or promotions to fans who follow them on social media. This paper presents a theoretical overview and conducts quantitative research. The theoretical presentation was created based on secondary data sources, while the quantitative research was conducted using a survey questionnaire created for the purpose of collecting primary data. The problem of the research was to investigate the influence of social networks on the engagement of fans of domestic and foreign football clubs, and according to the results obtained, the respondents were divided in their opinion when it comes to engagement on social networks. The research showed that social networks do not have a significant impact on the engagement of fans of domestic and foreign football clubs, but it also showed that information about domestic and foreign football clubs is most represented through social networks.