In this manuscript, we use Bitektine’s (2011) theory of organizational social judgments to develop a framework to Capture Perceptions of Organizational Legitimacy (CPOL). We outline a three-stage framework as a method to measure the perceived dimensions on which constituents scrutinize a sport organization’s legitimacy. In stage one of the framework, we defined the organizational context of a nonprofit sport organization in Sydney, Australia to establish the classification, purpose, and relationship of the focal entity to its constituents. In stage two, we distributed a qualitative questionnaire (N = 279) to identify the perceived dimensions on which constituents scrutinized organizational action. In stage 3 we distributed a quantitative questionnaire (N = 860) to test six perceived dimensions, which emerged during stage two of the CPOL framework. The six dimensions explained 63% of respondents’ overall organizational judgment, providing support for the CPOL framework as a context-driven process to measure constituent perceptions of the legitimacy of sport organizations.