Denison Library’s Special Collections are extensive and varied, ranging from classical literature to Californiana. They include the Scripps College Archives, which provide a significant record for the study of the college since its inception in 1926 and for the history of women’s education in general.

Immanuel Presbyterian Church has corporate minutes; organizational records of governing bodies, committees, and other subgroups; and membership records. In the church's library are publications dealing with the history of the church, which is over one hundred years old and was known as a leader in the neighborhood, the city, and the Presbyterian community during the 1930s, 1940s, and 1950s.…

The Institute for Baseball Studies is the first humanities-based research center of its kind associated with a college or university in the United States. The Institute is a collaborative effort of Whittier College administrators and faculty members, and the Baseball Reliquary.