Mangrove ecotourism management is a strategic effort to maintain the sustainability of coastal ecosystems and the livelihoods of local communities, the success of which is largely determined by the relationships and dynamics between stakeholders. This study aims to analyze the influence, dependency, and potential synergy and conflict between actors in mangrove ecotourism management in Tapaktugurejo, Semarang City. The study used a mixed methods approach. 16 actors grouped into academics, businesses, government, and the community. Data were then analyzed using the Mactor method to identify stakeholders' strengths, relationships, and alliance patterns. The results of the study show that the map of influence and dependence between actors in the management of mangrove ecosystems shows diverse positions according to their respective roles and capacities. The government has high influence but low dependence as the main regulator and policymaker. Actors such as academics, Tourism Awareness Group (Pokdarwis), Fishers wives (Tirang), Semarang City Tourism Office (Dinpar), and Tapak Environmental Youth Association (Prenjak) show a strategic role in connecting various parties. The government focuses on regulatory and coordination functions, while local communities and fishermen still have limitations in influencing policy. The actors like a Prenjak and Pokdarwis are central actors with a high level of convergence in encouraging cross-party collaboration. The success of mangrove management depends on strengthening relationships between local governments, communities, and other supporting institutions. Synergy between actors is the key to the sustainability of mangrove ecosystems and the improvement of the welfare of coastal communities.