Using the Typology Model of Adjustment and Adaptation, a family stress model, relationships among family hardiness, family stressors, family appraisal, coping, social support, and satisfaction with family functioning were examined in a sample of 57 families of children with developmental disabilities. Family hardiness was associated with family appraisal, social support, parental coping related to maintaining family integration, and satisfaction with family functioning. Higher satisfaction with family functioning was correlated with coping-integration, network support, functional support, and hardiness. Lower satisfaction with family functioning was associated with higher family stressor scores, social support loss, and increased parental age. Over 42% of the variance in family functioning was accounted for by family hardiness, functional support, family stressors, and parental age. The results highlight the value of continued investigations of hardiness in families.