We report findings from a meta-analysis of 156 studies conducted between 1987 and 2009 (N = 32,969) that examined the relationship between self-reported parental attachment and multiple adjustment outcomes and developmental advances during the college years. Overall, a small-to-medium relationship was found between indicators of parental attachment quality and favorable adjustment outcomes (r = 0.23). Effect sizes were of similar magnitude for mother and father attachment relationships, for male and female students, and across ethnicity and nationality of the sample. The attachment-adjustment relationship varied somewhat according to the developmental task being investigated in the study, showing the strongest association for the task of separation-individuation. Additionally, we found stronger attachment-adjustment links for students residing away from their parents when compared with students living at home during college. (Contains 8 tables and 4 footnotes.)