This study investigates church-based informal social support among older African Americans and Black Caribbeans. In particular, we examine the correlates of receiving emotional support as well as negative interactions (e.g., criticisms) from church members. The analysis is based on the older African American (n = 829) and Black Caribbean (n = 271) subsample of the National Survey of American Life. The analysis utilizes multiple group structural equation modeling (SEM) to test a model of church support networks. There were no significant differences between older African Americans and older Black Caribbeans in the frequency of service attendance, contact with church members (seeing, writing, talking), emotional support from church members, or negative interactions with church members. However, a comparison of SEM analysis indicates that the number and pattern of relationships are different. For instance, among African Americans church attendance was associated with emotional support, but among Black Caribbeans attendance did not have a direct or indirect effect on emotional support. Our findings also indicate that among older African Americans, women attend religious services more frequently and both receive emotional support and engage in negative interactions with church members more frequently than men. Among Black Caribbeans, however, men attend religious services less frequently than women but also have more negative interactions with church members. For both African American and Black Caribbean older adults, church members are an important element of their social support networks. Our analysis also underscores the importance of contact with church members for receiving emotional support for both populations.