The outbreak of COVID-19 (coronavirus) has a global impact on the spread of the disease and thus on smaller communities. Staff in libraries of all types, geographical locations and sizes learn the facts about this public health crisis, inform the public and tailor services and programs to the changing needs of the community. Public libraries are facing a paradigm shift: instead of returning to normal, librarians will return to the “new normal” - one in which service interactions may be impossible or no longer desirable, where collections in physical format can be a barrier to access. How to use this crisis to create new and innovative collections and services that can improve the community? This paper deals with the analysis of the operation of public libraries in times of crisis caused by COVID-19. Because of the virus, our daily lives have completely changed. Libraries have not remained immune to this problem either. The Internet is becoming an indispensable tool in education and business, and libraries with their websites and profiles on social networks are moving in this direction. This paper analyzes all the provisions and instructions issued for the operation of public libraries in crisis situations. Attention is drawn to the importance of continuous improvement of the library's online services, but also the development of guidelines and instructions for business in times of crisis. The paper conducts research aimed at analyzing the operations of public libraries during the crisis caused by the COVID-19 virus and analyzing the activities of libraries on websites and social networks of public libraries in Croatia.