The present study evaluated the long-term effectiveness of a cognitive behavioral group therapy program titled Community Opportunity Growth. This study monitored juvenile delinquents’ recidivism across a 7-year time period, with the average length to follow-up being 39 months. It was hypothesized that program graduates (N = 178) would have a significantly lower recidivism rate than a control group (program nonstarters; N = 66) and program dropouts (whose predisposing factors may have influenced their program participation; N = 150). Analyses controlled for sex, ethnicity, age, prior petitions, highest class of prior petition, and months to follow-up. Results show a general trend indicating the long-term effectiveness of the program as graduates had a lower incidence of petitions at follow-up compared with dropouts and fewer petitions compared with the other two groups.