Using data from the nationally representative Head Start Family and Child Experiences Survey (FACES), the relationships between living in a household where a household member had been arrested or incarcerated and conduct problems of preschool children enrolled in Head Start were examined. Children who lived in such households showed more aggressive, hyperactive, and withdrawn behaviors than children who lived in households with no such exposure. These associations remained statistically significant after controlling for other family background characteristics. Parental involvement in Head Start, less use of spanking, and more time spent by the child in Head Start were associated with less problem behaviors. (Contains 4 tables.)