This study examined parental and family stress and functioning where there is a child with fragile X syndrome. Mothers and fathers in 40 families were asked about their child with fragile X syndrome, family supports, their psychological stress, the marital relationship, and their family stress. Results indicate parents were well adjusted in terms of their levels of psychological stress and in their marital relationships, however, parents reported high levels of family stress. Mothers and fathers were found to experience similar levels of stress and to report similar levels of satisfaction with supports. Stress was predicted by different variables in mothers and fathers, suggesting that different processes underlie their experiences. The strongest predictor of maternal stress was the level of marital satisfaction while the strongest predictor of paternal stress was the level of the child's adaptive skills.