Student achievement was compared between Washington State middle schools with comprehensive school counseling programs (CSCPs) and those without. Statistically controlling for socioeconomic status, multivariate analyses of covariance revealed minimal differences between students in CSCP and non-CSCP schools. Significant score differences emerged, however, for students attending schools with at least 5 years of CSCP implementation versus their peers in non-CSCP schools. Girls outperformed boys on various achievement measures. The findings and their implications for middle school counseling practice are discussed. (Contains 3 tables.)