Growing urbanization affects women and men in fundamentally different ways, but the relationship between gender and city environments has been ignored or misunderstood. Women and men play different roles, frequent different public areas, and face different health risks. Women suffer disproportionately from disease, injury, and violence because their access to resources is often more limited than that of their male counterparts. Yet, when women are healthy and safe, so are their families and communities. Urban policy makers and public health professionals need to understand how conditions in densely populated places can help or harm the well-being of women in order to serve this large segment of humanity. Women's Health and the World's Cities illuminates the intersection of gender, health, and urban environments. This collection of essays examines the impact of urban living on the physical and psychological states of women and girls in Africa, Asia, Latin America, and the United States. Urban planners, scholars, medical practitioners, and activists present original research and compelling ideas. They consider the specific needs of subpopulations of urban women and evaluate strategies for designing spaces, services, and infrastructure in ways that promote women's health. Women's Health and the World's Cities provides urban planners and public health care providers with on-the-ground examples of projects and policies that have changed women's lives for the better.