This article explores whether citizens of city-regions hold a particular attitude about collective action. We model individual support for the new regionalist idea that communities sharing the same city-region (i.e., metropolitan area) should share resources across them to solve regional problems. Using data from a random sample survey of adults living in 15 metropolitan areas in the state of Georgia in the United States, we use Bayesian analysis to determine the effects of a set of individual and contextual factors on the attitude. Conventional political cleavages of race, gender, and place of residence produce the strongest effects. We offer a set of theoretical, methodological, and practical implications for future research on political orientations of citizens in city-regions.