Abstract: The study aimed at establishing the factors that affect sustainability of fish farming projects in public secondary schools in Kiambu County. The study was guided by the following specific objectives: to establish costs of inputs effect on sustainability of fish farming in public secondary schools in Kiambu County; technology effect on sustainability of fish farming projects in public secondary schools in Kiambu County; skills and training effect on sustainability fish farming projects in public secondary schools in Kiambu County and social-cultural factors effect on sustainability of fish farming projects in secondary schools in Kiambu County. The research used the descriptive survey approach.