An extensive literature on the politics of the family suggests that familial relationships play a central role in individuals’ political socialization and can ultimately shape one’s policy preferences. A current debate within this literature deals with the impact of daughters on fathers’ political attitudes. In this article, we address this debate in relation to a specific set of policy preferences and ask: Does the experience of fathering daughters affect men’s opinions toward gender-equality policies? In addressing this question, this study examines three theoretically motivated propositions: first, that having a daughter leads men to see the benefits of and support public policies that aim to reduce gender inequality; second, that fathers with a larger proportion of daughters express stronger support for these policies; and finally, that having a daughter as a man’s first child is a critical event in the political socialization of men, such that this experience of “first-daughterhood” will lead to higher levels of support for gender-equality policies. We use original representative survey data from a module on the 2016 Cooperative Congressional Election Study (CCES) to test these three hypotheses. The results of our analyses suggest that the experience of having a daughter as a first child—but not the effect of having a daughter in general nor the experience of fathering a higher proportion of daughters—significantly increases fathers’ support for policies designed to increase gender equality.