Over the past fifteen years, there has been increased attention in the humanitarian community regarding the ways in which women and girls are affected by conflict, violence, and displacement. Due to stigma and fear of retribution, which lead to under-reporting, it remains exceedingly difficult to obtain reliable data regarding the magnitude and nature of gender-based violence in conflict and displacement settings. It is in this context that the International Rescue Committee and Columbia University's Program on Forced Migration and Health embarked on a project to measure the magnitude of violence facing women and girls in two Somali refugee camps and one of the surrounding host communities. This report presents the findings from these studies, which use the Neighborhood Method, to measure incidents of violence against women and girls.