After many decades of promoting sustainable tourism and development, the world faces the pressing issue of overtourism. Overtourism is viewed as the condition where the growth of visitor volume puts destinations’ capacity under pressure resulting in many negative impacts on the environment, economy, culture, and society. It causes many community residents to resent tourism development. Visitors are concerned about their travel experience in overcrowded places. Understanding overtourism is necessary for destination management. This dissertation includes three studies to: 1) review the phenomenon of overtourism; 2) examine the perceptions of local residents and test the relationship between their satisfaction with quality of life and level of support for tourism development in overtourism context; and 3) examine the management of stakeholder involvement in an evidence-based sustainable tourism plan that aims to address overtourism. Different research methods are employed in the three studies of the dissertation: a conceptual paper based on literature review; a concurrent triangulation approach using both quantitative and qualitative data collected from a survey with host community; and a case study involving analysis of documents related to a sustainable tourism plan and in-depth interviews with key informants who were involved in developing the plan. Several theoretical or conceptual frameworks are used to guide research, including those that consider the relationship between residents’ satisfaction with QOL and their support for tourism development, crowding theory, stress coping framework, place attachment, and a multi-stakeholder involvement management framework. Sedona, a destination that is concerned about overtourism, was chosen to be the research site for two of the studies. Study 1 reveals the complexity of overtourism and pinpoints important aspects and details (e.g., causes, impacts) that need to be considered while solving overtourism. Study 2 investigates impacts of overtourism on the quality of life of the host community and identifies different ways residents cope with the crowding condition. Residents’ support for tourism development is influenced by their satisfaction with quality of life and possibly by their attachment to destination. Study 3 documents a comprehensive mechanism to manage stakeholder involvement and utilization of evidence in a sustainable tourism plan. Findings are helpful for destination management.