This study investigates the determinants of social support. We used a random sample of 211 female Chinese marriage migrants from a 2-year longitudinal secondary data set and conducted bivariate and multivariate multiple regressions to examine the associations of social support with acculturation stress, persistent acculturation stress, psychological wellbeing, perceived neighborhood disorder, and optimism. Results showed that marriage migrants have difficulties rebuilding their social network outside their own communities. Acculturation stress and psychological wellbeing were the two significant factors affecting social support. Findings suggest that social support interventions should focus on alleviating acculturation stress, expanding social networking opportunities, and enhancing psychological wellbeing.