The Australian Government's Higher Education Participation and Partnerships Program aims to encourage greater participation of students from low socioeconomic backgrounds in higher education. Historically, participation and retention rates of students from underrepresented groups have been less than for the majority of school leavers. Universities are now intensifying their efforts to improve retention, and expect all parts of their institutions, including the university library, to contribute. Through a review of conceptual and empirical literature, this paper identifies five potential means by which a library may contribute to student retention and concludes by outlining one library's approach to investigating its contribution. (Contains 1 table.)