The study was conducted to establish the relationship between corporate governance and sustainability of SACCOs in Nansana Municipality, Wakiso District, Uganda. The study used Jensen and Meckling (1976) Agency theory to analyze the corporate governance practices. The study involved 72 respondents from 24 SACCOs studied and it adopted cross-sectional and correlation research designs using both quantitative and qualitative research approaches. Data analysis was done using SPSS and interpreted using mean range 5point Likert scale, Pearson correlation analysis and multiple regression analysis. The study findings suggest that, corporate governance has a positive and significant relationship with sustainability of SACCOs. The study further established that, there was a significant and positive relationship between corporate governance and sustainability with a P-value of 0.001. The study rejected the null hypothesis as the P-value obtained of 0.001 was less than the stated significance level of 0.05 and therefore adopted the alternative one which states that there is a significant relationship between corporate governance and sustainability. The study concluded that corporate governance significantly influences sustainability of SACCOs. Therefore, the study recommended that the government and other donor agencies should focus more on funding SACCOs and training SACCO leaders of fund accountability as adequate finance is vital to sustainability. Lastly, SACCO boards and other stakeholders should strengthen other factors other than corporate governance which influence sustainability so as to operate fully on a sustainable basis.