This study examined the sources and frequency of, and dietary behavioral responses to, health-related social support and control in a racially/ethnically diverse sample of 1,361 adults with type 2 diabetes. Spouses were the most frequently reported sources of support/control for all racial/ethnic groups examined. Mexican Americans and Vietnamese Americans received more support/control compared to non-Hispanic whites. All types of social involvement were associated with good dietary behavior for Mexican Americans, whereas only support was associated with good dietary behavior for non-Hispanic whites. The findings underscore the importance of considering racial/ethnic differences in examining social network members’ involvement in chronic disease management.