To assess the effect of a training program designed to enhance the role of Muslim religious leaders (RLs) in promoting family welfare, including reproductive health generally and family planning more specifically.A panel study design was utilized; 136 and 115 RLs completed the self-administered questionnaires at baseline (pre-training) and endline (6months post-training), respectively. Scales were generated to assess RLs’ knowledge of the number of family-planning methods deemed to be acceptable according to Islamic teachings (9 methods, Cronbach α=0.85), attitudes toward family planning (7 statements, Cronbach α=0.67), and preaching and/or counseling on family-planning topics (7 topics, Cronbach α=0.85).Linear regressions controlling for sex, age, and educational attainment showed that, on average, RLs cited more methods deemed acceptable according to Islamic teachings (β=1.381; P<0.001), expressed more positive attitudes toward family planning (β=0.514; P<0.05), and preached and/or counseled on family-planning topics more frequently at endline compared with baseline (β=0.965; P<0.01).Culturally appropriate training for RLs can lead to a deeper understanding of, and appreciation for, reproductive health and family planning, with the effects manifesting as increased preaching and/or counseling about these important topics.