Using the latest third wave of the Asian Barometer Survey, we are able to identify the sources of regime support in East Asia within a comprehensive framework that takes into account both the ongoing theoretical debates over what sustains regime legitimacy and the particular contexts of the region. We found that regime support in East Asia has significant congruence and variation. On the one hand, political regimes in East Asia draw their political legitimacy from a common well. This is largely from their governance and government performance, notably government responsiveness, economic performance, and control of corruption. On the other hand, ideology and culture are also an important base for regime legitimacy in nondemocratic regimes. These regimes gain support from cultivating nationalism and national identity.