Although young age for both the parent and child is implicated in incidences of maltreatment, little is known about the association between parent or child age and protective factors related to child maltreatment prevention. With a sample of parents receiving child maltreatment prevention services in Kansas (N = 1993), we used regression analyses to examine whether the interaction of child and parent age influences family‐level protective factors over time. We found mixed support for each hypothesis, indicating that the age of parents and children differentially impacts family‐level protective factors. Implications for the Strengthening Families approach and child maltreatment prevention are discussed.