In an increasingly globalized world, organizations that operate in more than one country are a substantial part of the world economy. It is therefore beneficial to understand the attitudes of employees in different countries and their impact on the organization. One important area is organizational justice and its relationships with organizational trust (OT) and organizational commitment. This empirical study collected survey data from university employees across China, South Korea and Australia. We proposed that OT would mediate the relationships between affective organizational commitment (AOC) and both distributive justice (DJ) and procedural justice (PJ) in all three countries. In Australia, we found that PJ and AOC were significantly related, and OT fully mediated the PJ-AOC relationship. In China and South Korea, both DJ and PJ were significantly related to AOC, and OT fully mediated the PJ-AOC relationship. OT partially mediated the DJ-AOC relationship in China but fully mediated this relationship in South Korea. Implications for theory and for management practitioners are discussed, and areas for future investigation are identified.