Research on international migration often focuses on the outcomes for emigrants at their destination, thereby overlooking the consequences for the family members of migrants remaining in the home country. In source countries with rapidly aging populations such as Mexico, a critical public policy concern is how the elderly dependents of U.S. migrants fare while their children are away. This paper begins an examination of that topic by investigating the relationship between children’s migration status and parental health outcomes. Conventional wisdom suggests that family members of migrants should benefit from international migration due to the large flows of remittances from the U.S. to Mexico. Nonetheless, little is known about the fraction of these remittances going to elderly parents, particularly when migrants are old enough to have established separate households. In addition, elderly parents may require physical support in the form of hours of care from their children which may be disrupted when one child migrates and for which there may be no close substitutes. Finally, elderly parents may suffer emotionally when their children are absent, particularly when children lack the documents to legally cross the U.S.-Mexico border. The relationship between children’s migration and the health of elderly dependents left behind is thus theoretically uncertain and has been a growing area of research. John Giles and Ren Mu (2004) examine the question of how elderly health affects children’s migration choices in China. Randall S. Kuhn, Bethany Everett, and Rachel Silvey (forthcoming) explore the effect of children’s migration on elderly parents in Indonesia. Estimating a causal effect between children’s migration and elderly health, however, is naturally plagued by problems of endogeneity. Children may respond to parental health shocks by migrating themselves or both migration and parental health may be driven by some unobserved variable. Francisca Antman (2009) uses instrumental variables estimation to address this endogeneity problem for the case of Mexico-U.S. migration and finds evidence of a causal link between poor elderly health outcomes and children’s migration to the U.S. This paper aims to take a first step at exploring this issue by asking whether elderly parents of children in the U.S. suffer from worse health outcomes than their counterparts with no children in the U.S. Overall, I find evidence that a child’s U.S. migration is associated with a greater chance that his elderly parent in Mexico will be in poor physical and mental health.