In rural India, particularly in Bhagalpur district of Bihar, inadequate hygiene and limited access to sanitation significantly impact women’s health and empowerment. This study evaluated a community-based hygiene education intervention involving 200 women (aged 18–45) across 10 villages in Bhagalpur. Over three months, participants attended weekly sessions on handwashing, safe water use, sanitation, and menstrual hygiene. Using simulated but realistic data, pre- and post-intervention assessments measured changes in hygiene knowledge, practices, health indicators, and empowerment. Results showed substantial improvements: mean hygiene knowledge scores increased from 4.8 to 8.7 (p < 0.001); handwashing with soap at key times rose from 32% to 84%; use of hygienic menstrual products increased from 58% to 81%; and latrine use rose from 50% to 70%. Incidence of child diarrhoea in the previous two weeks declined from 27% to 12% (p = 0.01). Additionally, women’s active participation in health decisions increased from 60% to 82%, and 91% reported confidence in discussing hygiene and menstruation post-intervention, compared to 45% at baseline. These findings highlight the positive impact of targeted hygiene education on improving health outcomes and empowering women in low-resource settings. Despite relying on simulated data, the results align with broader evidence supporting water, sanitation, and hygiene (WASH) education as a vital tool for advancing public health and gender equity in rural communities.