The purpose of research is to investigate the relationship between capacity building and tourism growth in Uganda, focusing on the Uganda Hotel and Tourism Training Institute (UHTTI) in Jinja. Specific objectives include assessing capacity building in the Ugandan tourism sector, evaluating tourism growth, establishing the relationship between capacity building and tourism growth, and determining critical factors' moderating role. The research involved UHTTI's current and former students, trainers, administrative staff, and various tourism stakeholders. Achieving an 80.86% participation rate. The findings indicated that female respondents exceeded males in number. Most participants were aged 20-24 years, and a majority were single. Concerning capacity building, respondents expressed doubts about existing policies, emphasizing the significance of collaboration between government and training institutions. Teaching standards, curriculum relevance, and apprenticeship access were highlighted as areas for improvement. The study identified critical factors such as training resources, competent trainers, funding, political support, and infrastructure as instrumental in capacity building success. UHTTI graduates significantly impacted tourism growth. They enhanced employment opportunities, revenue generation, balance of payments, and sector productivity. Effective strategies included resource allocation, unified curricula, and private sector collaboration. Challenges included limited implementers and marketing strategies. Effective capacity building initiatives positively influenced policy development, training institutions, curriculum design, employment opportunities, and other critical factors. These factors, in turn, correlated with tourism growth. Importantly, the moderating role of critical factors was evident. The interaction between capacity building and critical factors significantly influenced tourism growth. Thus, a holistic approach integrating capacity building and critical factors is essential for sustainable tourism growth. The study concludes by emphasizing collaboration among stakeholders, integration of technology, tailored programs, regular evaluation, and a long-term vision for sustainable tourism growth.