The purpose of the study was to investigate the effects of parental involvement on academic performance at ST. Francis Cheptart Girls High school in Mosoriot town, Nandi County. The study employed both general and specific objectives to guide its’ investigation. The general objectives was to explore the impact of parental involvement on academic performance. Specific objectives included examining how parents level of education, participation in school activities and financial status influence academic outcomes. It was hypothesized that greater parental involvement would correlate with improved academic performance and increase students self-esteem. The study aimed to assess these effects in the context of student performance in national examination search as KCSE and KCPE. Data collection method involved the administration of questionnaires and interviews to gather insights in to the perceived importance and actual impacts of parental involvement on academic achievement. Chapters four and five of the study presented detailed analysis of the collected data, providing findings, conclusions, and recommendations based on the studies out come