O'Shaughnessy-Frey Library (OSF) is the main library on the St. Paul campus. The library houses materials in the humanities, sciences, social sciences, and business.
Charles J. Keffer Library, on the Minneapolis campus, supports the College of Business and the College of Applied Professional Studies, which includes the School of Education and the Graduate School of Professional Psychology.
Archbishop Ireland Memorial Library is the graduate theology library of UST and the Saint Paul Seminary School of Divinity. It serves seminarians and lay students in graduate and continuing education programs, UST undergraduates, and archdiocesan parish professionals.
Schoenecker Law Library, on the Minneapolis campus, serves as the intellectual heart of the UST School of Law. A mixture of formal and informal study spaces provides students, faculty, staff, and others in the legal community comfortable surroundings while working with information resources from an ever-expanding print, electronic, and microform collection.