This study used ethnographic data to examine the nature and functions of transnational relationships of low-income Latin American women who had immigrated to the United States and were living in areas of extreme poverty. Findings indicated that these Latin American mothers utilized transnational ties to help maintain the cultural identities of themselves and their children, to alleviate social isolation, and to provide a safer summer housing alternative for their children. Transnational ties may have had some negative consequences, including financial and social burdens associated with maintaining long-distance familial relationships. However, despite some negative aspects, we conclude that transnational ties are often an instrumental resource for immigrant mothers living in poverty and are vital to immigrant social mobility.