This paper examines whether marriage increases the risk of HIV infection among women aged 15-24 in Lesotho, Swaziland and Zimbabwe. We fi nd that in all the three countries, the risk of infection is signifi cantly lower for never-married young women than ever-married young women; however, the difference in risk disappears when we control for age, educational attainment, household wealth, and area of residence. Thus, our result highlights the importance of socio-economic and demographic factors in analyzing the link between marital status and HIV risk among young women. Particularly, our fi ndings show that age and education play a crucial role in determining the level of HIV/AIDS risk for young women. The result also implies that marriage as an institution does not necessarily elevate the risk of HIV infection among young women.