Social Greek letter organizations, known as fraternities and sororities, are prevalent fixtures on college campuses in the United States, and have been shown to alter academic, health-related, and social behaviors. Research has often focused on within-college effects due to data availability. Here, we examine how membership corresponds to post-baccalaureate outcomes using a nationally representative sample, finding evidence membership increases the likelihood students earn a graduate degree and marries a college graduate. For males, membership appears to increase the probability of post-graduation alcohol overconsumption, or at least self-perception of that behavior. Eleven other post-baccalaureate health, family, and education variables are unaffected.