This study examines the crisis management of COVID-19 in the municipality of Stock-holm by applying HRO-principles. HRO-principles are, according to earlier research, used by organizations with the ability to manage risky situations without mistakes. The HRO-principles were first used to study especially nuclear power plants and airplanes; the or-ganizations seemed to be able to avoid mistakes since they acted in accordance with the principles. Currently, the HRO-principles are increasingly applied to studies of crisis ma-nagement, for example COVID-19. The municipality of Stockholm is a particularly inte-resting case to study because of the high risks they encountered as the municipality that was affected the most in the beginning of a pandemic and also had to manage the exten-sive lack of knowledge. To perform the study, qualitative content analysis of written evaluations of the municipal crisis management was completed. This study draws con-clusions about the fulfillment of the principles and about lessons learned concerning the principles applicability in this crisis. The result shows that the municipality to a varying degree acted in accordance with the principles, however, no one of the five principles were completely fullfilled. The result also shows that lessons are learned from the HRO-prin-ciples applicability in this crisis. This study also highlights the need for further research about the HRO-principles in the study of crisis management.