This study intended to examine the moderating effect of organizational size in the influences of organizational culture and strategic management on good sport governance. To do so, we utilized a descriptive cross-sectional survey design to collect data through a structured questionnaire from 265 respondents randomly selected from six Ethiopian Olympic sports federations. We analyzed the data by using descriptives and structural equation modeling using SPSS 25.0 and AMOS 23.0. The results, in this regard, indicate that strategic management has significantly positive direct influence on good sport governance. But, the effect of organizational culture on good sport governance was not observed. Further, organizational size negatively and significantly moderates the relationship between organizational culture & good sport governance. However, the moderation effect of organizational size on the relationship between strategic management and good sport governance was not observed. The main effect analysis from the moderation effect indicates that organizational size has significantly positive impact on good sport governance. Hence, this study signifies the need for a fit between size and culture and amplifies the need to engage in strategic management for good sport governance practices in Olympic sports federations.