Community-wide health education campaigns have been implemented to improve knowledge and awareness among adolescents in Kenyan villages regarding reproductive health. A comprehensive search strategy was employed using multiple databases, including PubMed and Web of Science, with a focus on studies conducted in Kenya between and . Studies were included if they reported knowledge retention rates after community-wide health education campaigns targeting adolescent reproductive health topics. The review identified a median knowledge retention rate of 68% among adolescents who participated in the educational campaigns, with variations observed across different regions and campaign durations. Overall, this systematic literature review provides insights into the effectiveness of community-wide health education campaigns on adolescent reproductive health knowledge retention rates in Kenyan villages. Future research should explore interventions that enhance long-term adherence to recommended practices among adolescents after educational campaigns. adolescent reproductive health, knowledge retention, community-wide health education, Kenya Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.