This study compared two consecutively offered treatment programs to compare “treatment only” to treatment with the addition of case management services in a community-based treatment program for juvenile sex offenders. The two programs were operated using the same model of cognitive behavioral therapy and provided services for youth in both diversion and post-residential circumstances. A secondary data analysis utilizing a pre- and-post-test quasi-experimental design without random assignment was used. The sample included data for 144 clients from the comparison group (treatment only) and 171 clients from the case management group. Only clients who were terminated by 2/1/2012 were considered in order to allow for observations from the four year follow-up period. Analyses were conducted using primarily multiple logistic regression to test hypotheses. Case management was a statistically significant (p = 0.011) predictor of non-sexual re-offense for diversion youth. Program completion was a statistically significant predictor of non-sexual re-offense for both diversion (p = 0.003) and post-residential (p = 0.032) youth, as well as, sexual re-offense for diversion (p = 0.043) youth. While case management was not a statistically significant predictor of program completion, the case management group had a higher rate of program completion which may be clinically significant for the program evaluation. The case management group experienced a 14.3% non-sexual re-offense rate which was decreased from 28.6% in the comparison group. Both the case management and the comparison groups had a very small rate of sexual re-offense and the change between the two groups was not statistically significant. However, the change may have clinical significance as the case management group had a 2.9% sexual re-offense rate as opposed to the comparison group rate of 7.6%