Friends Historical Library documents the history of the Religious Society of Friends (Quakers) and its principles, such as human rights, peace, and simplicity. The Library is a significant research collection for the history of the Mid-Atlantic, and it maintains the Swarthmore Historical Society Archives.

The Swarthmore College Peace Collection documents non-governmental efforts for nonviolent social change, disarmament, and conflict resolution. It is the most extensive research library and archive collection in the United States focusing solely on movements for peace around the world.

The Swarthmore College Archives include records of the College as a corporation, its Board of Managers, key administrative offices, and academic units. It also holds student records and records of student organizations, classes, and alumni groups.

The Rare Book Room is home to a vibrant and continually growing collection of over 6,000 fine press and artists' books representing all aspects of the physical book, Swarthmore publications, first editions, and eclectic works, a number of which were donated to the college by alumni.