Together with Sergi Pardos-Prado, I have written an article on corruption and public support for decentralization, which now has been published open-access in European Journal of Political Research, a leading peer-reviewed journal in political science. We propose a new theoretical explanation of support for decentralization by emphasising the important role of quality of governance. In a survey experiment in Spain, we show that information on national‐level corruption increases preferences for decentralization and secession. Information on regional‐level corruption pushes citizens of highly corrupt regions to prefer national retrenchment and unitary states. A cross-national analysis of survey data from the European Values Survey shows that our findings are generalizable beyond Spain.