This thesis entitled Public Relations in Public Libraries with a Review of the Activities of the Slavonski Brod City Library consists of a theoretical part that supports the topic of the work and the analysis and evaluation of activities carried out in the Slavonski Brod City Library. The second chapter provides a definition of public libraries, non-profit organizations and explains the role of public libraries as non-profit organizations. The third chapter deals with the transformation of libraries in the new age as well as the readiness of libraries and librarians to participate in the changes of the new age. The topic of marketing in culture (especially in libraries), public relations, their planning and implementation, and the techniques and tools needed for their implementation are further addressed. Successful public relations create a positive image of the library, and thus guarantee the arrival of new users and thus justify the role of the library. Its publicly visible activity is a prerequisite for successful business. The second part of the paper describes the activities of the City Library of Slavonski Brod, which presented the City Library of Slavonski Brod as an institution responsible to its users and all citizens of Brod, which seeks to position itself as an active and indispensable factor in the culture of Slavonski Brod. Each project brings an overview of activities in public, media coverage of each program. The tabular overview emphasizes the techniques and tools used in the implementation of the program. Through its programs, the Slavonski Brod City Library has established itself as: a custodian of the ship's cultural heritage, a promoter of Croatian literature, a socially sensitive institution, an institution with a strong sense of empathy for vulnerable groups of children, an active partner of education, a leader in innovative cultural programs. less related associations. At the end of the paper, the conducted research by the method of interviews is presented, which contains data on the respondents' satisfaction with the implemented programs.