What determines incumbent chief executives’ re-election in local government? Most of the literature focuses on the impact of political or economic factors. Yet, given that incumbents also strive to manage the administrative performance of local government, this is an important oversight. We examine whether and to what extent incumbents’ administrative innovation, as a new administrative factor vis-à-vis conventional political and economic factors, determines incumbents’ re-election. Analyzing 292 incumbents’ re-election and vote shares in the two most recent local government elections in South Korea, we find that both political and administrative factors are significant determinants. While political determinants, such as partisan alignment with the central government and affiliation with major parties, have the largest impact, administrative innovation also has a statistically and substantively significant effect. The implications of our findings are clear: incumbents are held accountable not only for their political attributes but also for their administrative performance in local government.