The David Alexander Collection contains a wide-range of materials relating to Pomona College’s institutional history, including administrative correspondence, event materials, and building and campus organization files. The bulk of the collection includes materials previously housed in the Pomona College President’s Office and spans over a century in scope, from 1888 to 2001.

Collection consists of photographs and postcards, primarily of the Canton Christian College campus, including portraits, classroom activities, sports, children, military, and campus buildings. Also included are photographs of landscapes of Canton. Most photographs have "1910s" penciled on the back, the only indication of date.

This collection contains course materials, departmental correspondence, research notes, reports, photographs, and articles belonging to Pomona College physics professor, Charles A. Fowler.

This collection contains materials from the planning of the Joint Science Project of the Honnold Library and Harvey Mudd College, including building, planning, and funding documents.

The Kenneth Morgan Slide Collection features an assortment of 35mm slides related to the Pomona College Class of 1919 and its reunion activities, as well as images of campus buildings, student activities, and the early City of Claremont.

A collection of architectural plans for Pomona College and Claremont Colleges buildings, both on and off campus. Spanning from 1922 to 2006, the collection includes architectural drawings, blueprints, sketches, renderings, building plans, and other building documentation.