The study investigated the effect of stakeholder engagement in implementation on electronic waste management (EWM) among households, business owners, and local officials in Rubaga Division, Uganda. A mixed-methods case study design was employed, utilizing structured questionnaires and interviews to collect quantitative and qualitative data from a sample of 97 respondents selected through purposive and simple random sampling from an accessible population of 200. The data were analyzed to determine the correlation between stakeholder engagement in implementation measured through community mobilization, realization of action plans, and dissemination of information and EWM effectiveness. The results revealed a very strong, statistically significant positive correlation between the two variables, with a correlation coefficient (r) of 0.890 and a significance value (p = 0.000). This indicated that as active stakeholder involvement in the implementation of EWM activities increased, management outcomes improved substantially. The null hypothesis was therefore rejected, confirming that the observed relationship was not due to chance. The study concluded that stakeholder engagement in implementation is a critical and powerful determinant of effective EWM, accounting for a significant proportion of variability in waste management performance. It was recommended that Rubaga Division implement targeted policies focused on active community mobilization, clear role allocation in waste handling, and continuous information dissemination to enhance participation, improve service delivery, and ultimately achieve a cleaner urban environment.