BACKGROUND: Inadequate and delayed access to sexual and reproductive health services among the Hill Tribe population can be attributed to the intersection of socioeconomic challenges and distinct cultural practices. To address this limitation and create a tailored model capable of addressing it, this study assesses the effectiveness of the Community-Based Reproductive Health Care Model (CRHC) in enhancing reproductive health knowledge, attitudes, and practices among Lahu women, a prominent hill tribe population in Northern Thailand. METHODS: Implementing the CRHC model includes training programs for community influencers and subsequent education for Lahu women using culturally adapted courses. The effectiveness of the model is assessed through pre-test and post-test comparisons of knowledge, attitudes, and practices related to reproductive health care and analyzed using paired t-tests and repeated ANOVA. RESULTS: The scores for knowledge, attitudes, and practices among Lahu women changed from 8.92 ± 2.02, 52.99 ± 5.54, and 27.76 ± 6.67 to 10.47 ± 2.32 (p <
0.001), 56.61 ± 5.54 (p <
0.001), and 29.47 ± 6.76 (p = 0.030), respectively. Significant improvements are observed in these areas, particularly in maternal health practices among pregnant Lahu women (n = 11). This study additionally evaluates the model's impact on the healthcare system by analyzing changes in government performance indexes, showing increased access to high-quality antenatal care and contraceptive usage. This study highlights the challenges faced by hill tribe populations in accessing healthcare, emphasizing the need for tailored reproductive health education and the importance of addressing health insurance barriers. CONCLUSION: The CRHC model's success illustrates the potential of community-based, culturally sensitive interventions in improving reproductive health outcomes, providing valuable insights for similar interventions in other indigenous or marginalized communities.