This study examined Head Start's impact on fathers' school-based involvement and associations with Black children's cognitive, behavioral, and social-emotional skills. With a sample of 1,354 Black children, fathers' involvement was measured as attendance at school meetings, teacher conferences, school events, and/or volunteering at school events. Children's cognitive skills were literacy, language, and mathematics scores. Parents reported on the parent-child relationship, children's social skills, and behavioral concerns. Non-resident fathers in Head Start were more involved in Black children's schooling than not enrolled in Head Start. Unexpectedly, fathers' school-based involvement and Head Start enrollment were not related to children's developmental outcomes at kindergarten age. Head Start serving impoverished Black families should consider implementing targeted school-based father involvement initiatives that directly influence children.