Runaway youths represent a vulnerable, high-risk population that has received little societal attention. Studies show that youths at greatest need are the least likely to access mental health, medical, and other social services. This study evaluated service utilization, including medical visits, psychological, alcohol and drug counseling and 12-step attendance, and substance use. Runaway youths (n = 51) between the ages of 12 and 17 with a diagnosis of alcohol abuse or dependence were recruited from two southwestern runaway shelters. Results showed that psychological counseling and medical visits were associated with less alcohol use while 12-step attendance was associated with more alcohol use at pretreatment. Service utilization was not associated with illicit drug use. The findings suggest that alcohol and other drug use are affected differently by service utilization in this sample of youths. More research is required to evaluate and develop treatments which can effectively intervene with this high-risk group.