22 April 2020 - Support for gender equality has risen, globally. Analyses of this trend focus on individual and/or country-level characteristics. But this overlooks sub-national variation. City dwellers are more likely to support gender equality in education, employment, leadership, and leisure. Why is this? This paper investigates the causes of rural-urban differences through comparative, qualitative research. It centers on Cambodia, where the growth of rural garment factories enables us to test theories that female employment fosters support for gender equality: potentially closing rural-urban differences; or whether other important aspects of city-living accelerate support for gender equality. Drawing on this rural and urban fieldwork, the paper suggests why social change is faster in Cambodian cities. First, cities raise the opportunity costs of gender divisions of labor – given higher living costs and more economic opportunities for women. Second, cities increase exposure to alternatives. People living in more interconnected, heterogeneous, densely populated areas are more exposed to women demonstrating their equal competence in socially valued, masculine domains. Third, they have more avenues to collectively contest established practices. Association and exposure reinforce growing flexibility in gender divisions of labor. By investigating the causes of subnational variation, this paper advances a new theory of growing support for gender equality.