The Gerritsen Collection (also known as the Gerritsen Collection of Aletta H. Jacobs or the Gerritsen Collection of Women's History) is a diverse collection of women's archival materials and feminist records covering fifteen languages and over 4,700 volumes. Acquired by the John Crerar Library of Chicago in 1903, it was subsequently sold to the University of Kansas in 1954. In the 21st century, the holdings were digitized and are now widely available through subscription to libraries worldwide.