The gender wage gap reflects income inequality between men and women. In Indonesia, men earn an average monthly wage of 3.23 million rupiah, 25% higher than women’s 2.42 million rupiah. This disparity affects resource access and limits women's opportunities due to wage constraints and societal roles, perpetuating stereotypes and prioritizing men’s societal positions. This study examines gender segregation and wage differentials in Indonesia, focusing on the roles of education and occupation in shaping these disparities. Using the Indonesian Labor Force Survey (Sakernas) from 2019 to 2024, we employ Mincerian wage regressions, Heckman selection with instrumental variables to address selection bias, and Neumark decomposition to analyze wage distribution. To our knowledge, this is the first study linking educational segregation to gender wage disparities in Indonesia, offering new insights into how segregation influences wage differentials. Findings aim to inform policies addressing wage inequality and promoting gender equity.