: This paper is a result of a direct survey of forty-two MPA managers-individuals directly responsible for site management- regarding the institutional arrangements governing the development and management of a single, specified MPA. Results indicated that Wider Caribbean MPAs were usually established without comprehensive information regarding local biological and socioeconomic conditions. Participation in MPA development and management varied extensively by stakeholder group and by governance process. National government and local groups (resident users, local governments, and local nongovernmental organizations) were the stakeholders most frequently “actively involved” in MPA governance.