This special issue explores different dimensions and drivers of urban food insecurity, but share a focus on low-income and marginalized groups. The key questions explored in this issue include 1) the links between urban poverty and food insecurity, 2) the contribution of food safety concerns to the restriction of traditional and informal food markets, and the impacts for low-income consumers and traders, 3) the importance of using a gender lens to understand the challenges to achieving food securit, and 4) the often underestimated role of food in social relations and in supporting community networks. »