ABSTRACT This study was carried out in Tirap division, Marakwet district Kenya with an intention to determine and identify the outstanding challenges of Universal Primary Education in Kenya, while reflecting some selected government aided primary schools in Tirap division. On this note, all other authors' works similar to this particular study were revisited and this formed the basis of the researcher's review of related literature. A descriptive survey design was employed since the whole study was about explaining a scenario I an event or occurrence. In the process of data collection, questionnaires and interview guides were employed after which data was analyzed and presented in percentages and fi-frequency distribution tables. The findings fi'om the study revealed that among the outstanding challenges to Universal Primary Education included; uncongenial home environment, dull curriculum, inadequate trained teachers, over population, financial resource mismanagement, poor government monitoring and supervision, limited number of schools, cultural practices, lingering insecurity and inadequate physical facilities. It was recommended in this study that government funding and monitoring of Universal Prima,y Education in the area of study be revisited and the need for curriculum review to suite both the interests of the government and those of the learners.