Introduction: Father involvement in early childhood (EC) programs has increased over the last several decades supported by recent attention on the positive influences of fathers on children. Program initiatives such as Early Head Start, and the fact that the majority of children ages 0 to 5 are enrolled in one or more programs in the U.S. make EC programs an important context for engaging fathers and supporting positive father involvement. This chapter will review the different types of EC fatherhood programs and summarize what is known about the effects of these programs on fathers and children.