Objectives: In this study, we assessed the effect of Family Diabetes Self-Management Educa- tion (DSME) intervention on changes in self-care behaviors among Marshallese adults with type 2 diabetes. Methods: Marshallese adults (N = 211) with type 2 diabetes were randomized to a Family DSME intervention or a Standard DSME intervention. We assessed changes in diabetes- related self-care behaviors from baseline to 12 months within and between study arms using descriptive statistics and mixed effects logistic regression models adjusted for demographic characteristics and use of diabetes medication. Results: Family DSME participants had increased engagement in glucose monitoring and doctor visits, whereas Standard DSME participants had increased engagement in glucose monitoring. Family DSME participants increased engagement in glucose monitoring more than Standard DSME participants. Conclusions: DSME can improve some diabetes related self-care behaviors. Future studies on diabetes management should consider developing and testing interventions that seek to improve long-term rates of engagement in self-care behaviors.