Female genital cutting (FGC) continues to be widespread particularly in sub-Saharan African countries. We use data from the 1999 Nigeria Demographic and Health Survey to consider factors that influence attitudes toward this procedure held by Nigerian women aged 15–49. We test four models: model 1 explores whether attitudes are consistent with a view of FGC as a social convention associated with marriageability of women. Model 2 examines the impact of modernization factors such as education and urbanization. In model 3, the influence of media and community activities are considered. Model 4 includes all of the factors in the three previous models. We find strong support for considering FGC a social convention. Modernization has minimal impact on attitudes about FGC mainly through its influence on the social convention.