This study reviews and analyzes the published empirical research on the role of social media in promoting political expression and participation in Confucian Asia, including China, Hong Kong, Singapore, South Korea, and Taiwan. In addition to providing a narrative review of the literature, our analyses show clear numerical estimates of the relationships among different types of social media use (i.e., informational, expressive, relational, and recreational), political expression, and participation in Confucian states. The findings reiterate the importance of the expressive use of social media, showing its moderately strong relationship with participation. The findings also show weak positive relationships with informational and relational uses. We also examine the role of political systems in these relationships and conclude that the strongest relationships are in democratic states, followed by hybrid and authoritarian systems.