Promoting green socioentrepreneurship is crucial for sustainable economic development in the Asia-Pacific region, particularly in highly urbanised areas such as Taiwan and Hong Kong. However, little research has focused on this topic. Therefore, we conducted two studies to analyse how personality traits, entrepreneurial creativity, and social capital affect green socioentrepreneurial intentions among university students in Taiwan and Hong Kong. The results of Study 1 confirmed the factor structures of the four scales used in this study. The results of Study 2 revealed that though the effects of predictor variables on the outcome variable were varied, the mediation models of entrepreneurial creativity across contexts were partially supported. The major differences between Taiwan and Hong Kong lay in the effects resulting from usefulness, openness, agreeableness, conscientiousness, and bonding social capital.