With the development of the Internet, social networks have become the inevitable communication channel of many organizations and brands. Because of many advantages like speed, large amount of information, worldwide users and easy access to them, social networking is nowadays used in communication with the internal and external target audience. Importance of social networks was also recorded in crisis situations where they can be of great help if managed well. The purpose of this master thesis is to address the topic of social networks and their role in crisis situations. This thesis is divided into five chapters in which the most important terms are further explained. Social networks, as well as the relationship between social networks and public relations are defined in the first chapter. The part that follows is devoted to crisis communication management, the emergence and development of the crisis and general crisis communication. These two chapters are merged in the fourth chapter, which refers to management of crisis communication through social networks, explaining the role of new media in crisis situations, their use, crisis communication strategies and the importance of popular influencers. This master thesis goes with the assumption that existence of a crisis communication plan is extremely important. This assumption will be explained in the last part of the paper work, where various well-known examples of crisis communication on social networks will be analyzed. For writing this paper, various professional literature from Croatian and foreign authors was used, and the aim was to explain the specificity and importance of communication in social networks.