This quantitative study examined the effects of marijuana on academic and social involvement in undergraduates using a structural equation model. The study was conducted at a midsized comprehensive community college in the Midwest and was guided by Astin's (1985) theory of student involvement. A survey link was e-mailed to all 4,527 eligible students at the college, and 573 students participated in the study. Of the 573 students, 194 identified as users of marijuana and were used as the primary basis of the study. The data from the survey were used in a structural equation model to determine correlations between academic and social involvement and marijuana use. The overall results of the study showed no significant correlation between marijuana use and academic and social involvement.