Corruption is widely seen as a major problem, in developing and developed countries alike, and much has been written on its determinants and correlates. This paper pursues the first systematic investigation of a hitherto underappreciated element in this story: the spatial distribution of the population in a given polity of interest, relative to the seat of political power.This spatial distribution might affect the incentives and opportunities for public officials to misuse their office for private gain. In particular, it may affect the degree of accountability, as has long been noted in the particular context of US state politics. For instance, Wilson's (1966) seminal contribution argued that state-level politics were particularly prone to corruption because state capitals are often far from the major metropolitan centers, and thus face a lower level of scrutiny by citizens and by the media: these isolated capitals have "small-city newspapers, few (and weak) * Campante: Harvard Kennedy School, 79 JFK Street, Cambridge, MA 02138, and NBER (e-mail: filipe_ campante@harvard.edu); Do: Department of Economics and LIEPP, Sciences Po Paris, 28 rue des Saints-Pères, 75007 Paris, France (e-mail: quocanh.do@sciencespo.fr). We are grateful to three anonymous referees for many helpful suggestions. We also thank