The role social network structure plays in facilitating flows of support between spouses is often overlooked. This study examined whether levels of support between spouses depended on the degree of overlap between spouses' networks. Network overlap may enhance spouses' support capacities by increasing their understanding of each other's support needs and their ability to coordinate support for each other. Data on 1,490 married older adults from the National Social Life, Health, and Aging Project were examined. Analyses revealed that when one's spouse had more contact with one's other network members, one was more likely to (a) view the spouse as a reliable source of support, (b) open up to the spouse, and (c) discuss health issues with the spouse. These results suggest that spousal support is not only a function of relationship quality or obligations--it also is a structural phenomenon that depends on spouses' connectedness to each other's networks.