The Rare Book Collection, consisting of some 125,000 volumes, covers a broad spectrum of subjects but the strengths are: Roman Catholic Church history, liturgy, law, and theology; English and American literature; Irish studies; and more generally art, architecture, and science. Imprints range from 1460 to the present.

Personal and Institutional Libraries: Astrik L. Gabriel Collection of Early Printed Books  |  Olmütz Monastic Libraries  |  Dominican Convent of St. Raymond de Peñafort  |  Library of José Durand  |  Theodore M. Hesburgh, C.S.C., Collection  |  Sweetman Family Library

Author-based Collections: George Berkeley Collection  |  Edmund Burke Collection  |  G. K. Chesterton Collection  |  Dante Collection  |  René Descartes Collection  |  Eric Gill Collection  |  Edward Gorey Collection  |  James Clarence Mangan Collection

Subject-oriented or Topical Collections: Botany Collection  |  Fundamentalist and Evangelical Magazines Collection  |  Hispanic Caribbean Literature Collection  |  Incunabula  |  Inquisition Collection  |  Irish Collections  |  Latin American, Spanish, and Spanish Colonial Collections  |  O'Neill Collection of Traditional Irish Music  |  Pope Paul VI Collection  |  Southern Cone Literature Collection  |  Joyce Sports Research Collection

Private Press Collections: Cuala Press  |  Ediciones Vigía  |  Golden Cockerel Press  |  Kelmscott Press  |  Limited Editions Club  |  Overbrook Press  |  Perishable Press  |  St. Dominic's Press  |  Stanbrook Abbey Press

Paperback Collections: Armed Services Editions  |  Penguin Editions