The C. Rexford Davis William Cobbett Collection has about 400 cataloged titles on the English parliamentarian, pamphleteer, and radical William Cobbett (1763-1835).
The Helene and Josephine Lewinsohn William Hone Collection includes over 500 published titles and over 300 manuscript items by, about, and associated with William Hone (1780-1842).
The Louis R. Ormont Literary Collection focuses on Dr. Ormont’s literary career as a playwright and includes manuscripts, academic papers, play programs, and more.
The Louis R. Ormont Psychology Collection consists largely of his publications on group therapy and also includes handwritten notes, research materials, and more.
Launched by the Friends of the Adelphi Library, the Children's Illustrated Literature Collection focuses on the Golden Age of Children's Book Illustration (1860-1930s) and illustrated literature from other periods.
The Cuala Press Collection has over 100 titles of poetry and includes plays, broadside ballad sheets, music, and ephemera printed by Dun Emer Press and Cuala Press.
The Dr. Henry Drysdale Dakin Collection consists of science titles from the libraries of Dakin (biochemist, 1880-1952) and Dr. Christian A. Herter (physician and biochemist, 1865-1910)
The John DePol Collection includes beautifully illustrated books, prints, ephemera, and secondary sources by and about an exemplary practitioner of wood engraving.
The Kraus-Boelte Early Childhood Education Collection honors Maria Kraus-Boelte (1836-1918), who helped create kindergarten and the profession of kindergarten teaching in the U.S.
The Expatriate Collection includes over 200 titles by and related to American expatriate writers such as Gertrude Stein, Alice B. Toklas, and T. S. Eliot.
Grover Cleveland Loening (1888-1976), aeronautical engineer and author, was the first person awarded an aeronautical engineering degree in the United States.
The Long Island Collection contains over 350 titles of local historical interest, including town records, community histories, and material on local Indian tribes.
The Aimee Ornstein Memorial Library of Banking and Money Management has about 100 Special Collections titles on the early history of banking in the United States.
The Donald V. L. Kelly Small Press Collection gathers limited edition and letterpress publications, facsimile editions, related examples of fine printing, and secondary sources to support research.
The Richard Stoelzer Chamber Music Collection consists of musical scores, manuscripts, and a number of rare stringed musical instruments used by Stoelzer’s chamber group.
Former Adelphi Professor Emory Holloway (1885-1977), author of Whitman: An Interpretation in Narrative, provided the core of The Walt Whitman Collection.
The Hugh Allen Ward and Winifred Alling Ward Keith Collection of the Papers of Timothy L. Woodruff (1858-1913) covers early 20th century New York and U.S. and the early history of Adelphi College.