Though several countries have adopted the sexual violence law which criminalizes child marriage, the practice of early marriage persists in Sub-Saharan Africa. This paper examined the socio-economic and demographic determinants of early marriage among young women in four Sub-Saharan African (SSA) countries, namely Niger, Democratic Republic of Congo, Mali and Malawi. Descriptive and multivariate analyses were performed to show that young women without formal education have 1.62, 1.59, 1.55 and 2.08 times more risk of early union than their secondary or higher educated counterparts. The study recommends the implementation of a universal, free and compulsory basic education in SSA countries.