Girl-child education has been widely recognized as a critical driver of national development, yet disparities in educational access continue to hinder the socio-economic and political advancement of women in Nigeria. This study examines the impact of girl-child education on national development, with a specific focus on the Federal Capital Territory, Abuja, Nigeria. The research employed a descriptive survey design involving 500 respondents, including female students, teachers, and community stakeholders, selected through stratified random sampling. Data were collected using structured questionnaires and semi-structured interviews and analyzed using descriptive statistics, Pearson correlation, and regression analysis. The findings reveal that girl-child education significantly enhances socio-economic empowerment, including household income, entrepreneurial participation, and poverty reduction. Additionally, female education positively influences political participation, governance engagement, and overall national development indicators, such as health and literacy outcomes. The study highlights that socio-cultural barriers, early marriage, and economic constraints remain significant challenges to female education in Federal Capital Territory, Abuja Nigeria. The findings underscore the importance of implementing targeted educational policies, community sensitization programs, and scholarship initiatives to improve female access and retention in schools. The study concludes that girl-child education is a fundamental strategy for achieving sustainable national development and fostering inclusive growth in Nigeria.