Psychosocial adjustment in children of alcoholics (COAs; N = 125) was examined before and at 3 follow-ups in the 15 months after their fathers entered alcoholism treatment. Before their fathers' treatment, COAs exhibited greater overall and clinical-level symptomatology than children from the demographically matched comparison sample, but they improved significantly following their fathers' treatment. Children of stably remitted fathers were similar to their demographic counterparts from the comparison sample and had fewer adjustment problems than children of relapsed fathers, even after accounting for children's baseline adjustment. Thus, COAs' adjustment improved when their fathers received treatment for alcoholism, and fathers' recovery from alcoholism was associated with clinically significant reductions in child problems.