This study was an assessment of the effects of Public support for Public Private Partnerships (PPPs) in garbage collection and disposal in Nairobi City County (NCC) in Kenya. The study used a census method, where fifty seven private companies involved in garbage collection and disposal in NCC, were given questionnaires to answer. The main respondents in these companies were managers or supervisors since they are well equipped with policies, strategies and general operations of these companies. This ensured a reliable source of data. Sanni, (2016) observed that public support was among the key factors affecting the implementation of PPPs in different sectors of the economy. Therefore, this study aimed to establish whether public support does affect implementation of PPPs in garbage collection and disposal in NCC. Public support in this study was determined by three key indicators: public participation in garbage collection and disposal, disposing in designated areas and willingness of residents to pay for garbage collection service. Public support had a R2result of .300 or 30.0%, which implies that the independent variable, public support can explain up to 30.0% of the total variability in the dependent variable, implementation of PPPs in garbage collection and disposal in NCC. The results confirmed Sanni, (2016), observation that public support is a key determinant in implementation of PPPs. The results also showed that public support as a statistically significant positive influence on implementation of PPPs in garbage collection and disposal in NCC(p-value = .000). This is less than the level of significance of 0.05. Therefore, any change in public support would result in .658 times changes in the implementation of PPPs in garbage collection and disposal in NCC.