With this paper we study the impact of decentralization on turnout. We test the hypotheses that decentralization increases turnout in subnational elections, lowers participation in national elections, and reduces the gap between regional and national arenas. A comparative cross-national analysis does not show any significant effect of decentralization on turnout in national elections. But we take a closer look at two countries, Canada and Spain, where fiscal decentralization has taken place during the past decades. In both countries the empirical evidence suggests that decentralization has contributed to reducing the turnout gap between regional and national elections.