Currently available data and concerns about the validity of reports by mothers significantly truncate the ability of researchers to address a myriad of research questions concerning the involvement of fathers in families. This study aimed to inform this concern by examining predictors of father involvement and father-mother discrepancies in reports of involvement within a low-income, predominantly minority sample of families with both resident and nonresident fathers (n= 228). Paired hierarchical linear models were used to control for the interrelation between pairs of reporters. The results indicate that although fathers' and mothers' reports are similar, mothers consistently report lower levels of involvement than do fathers. Parental conflict, fathers' nonresidence, and fathers' age, as well as mothers' education and employment, predicted larger discrepancies between fathers' and mothers' reports.