Although research on low-income, nonresidential fathers is expanding, fathers’ involvement with their children over time has mainly been studied using composite measures of involvement. This study examines 3 domains of father involvement (financial support, child care, decision making) with a sample of young, low-income African American mothers (N = 248). These domains are examined separately to assess the extent to which unique patterns and predictors of involvement emerge over time from 4 months to 2 years postpartum. Trajectory analyses provide a similar set of trajectories for child care and decision making, and suggest that stability in either high or low levels of involvement was more common than decline over time. We identify only 2 trajectories of financial support. Relationship features, both prenatal and at 4-months postpartum, significantly predicted high involvement versus sustained low involvement for all three domains; however, a unique set of predictors of trajectory membership was found for each domain. Domain-specific findings are compared with findings from a supplemental, composite involvement approach to evaluate the utility of a domain-specific approach.