Municipalities in Sweden are an actor in civil defense and are responsible for crisis management at the local level. They have several commitments that could be expanded as a result of proposals in the government investigation SOU 2022:57, especially that collaboration between municipalities and volunteers should be expanded. Challenges for municipalities to use volunteers have previously been highlighted in research, but there is less research on collaboration between municipalities and volunteers. A variant of collaboration and management is collaborative governance, and this thesis aims at examinate the collaboration between municipalities and volunteers, from the perspective of municipalities and how it can be seen through collaborative governance. It has been investigated through semi-structured interviews with municipal employees in nine municipalities. The results indicate that there are several variants of collaboration between municipalities and volunteers as well as several challenges and opportunities. Furthermore, the results suggest that municipalities can to some extent be considered to work together in accordance with collaborative governance.