Using data from the National Survey of Families and Households, this study explores how single-parent, stepparent, and two-parent biological family structures may affect the transmission of gender ideology from parents to their adult children. Results indicate that biological parents' ideologies are strong predictors of their children's ideologies. Stepparents' ideologies are predictive of their stepchildren's only when they have high-quality relationships. Parent-child gender heterogeneity, performance of traditional parenting roles, and relationship quality are related to high similarity scores. The authors find evidence of converging ideologies between mothers and sons and diverging ideologies for fathers and daughters--especially in stepfamilies. Finally, their results suggest that high-quality relations with a stepparent enhance transmission between same-sex biological parent-child dyads but high-quality relations with a spouse in two-parent biological families produce a competing role-model dynamic. (Contains 1 figure and 4 tables.)