Items in New York Heritage are organized into collections, which provide additional context for understanding their significance and meaning.

This collection contains images of medieval and early modern manuscripts, manuscript leaves, and book leaves.
The Frederick Lawrence Pomeroy Collection consists of family correspondence, news clippings, telegrams, and transcripts of sermons.
This collection provides a record of the Glebe's activities from the 1790s through the early 1900s.
A collection of reports, minutes, and scrapbooks relating to New York State chapters of the Woman’s Christian Temperance Union, the bulk of which relate to the Unadilla, New York local union.
The Reid Gallery of Prominent Citizens at the Jervis Public Library in Rome, New York, contains "photographic portraits of prominent men who have in some way been connected with the history of Rome, or its vicinity, who have been born in Rome or have lived in Rome and who have attained prominence in the city of Rome or elsewhere," along with a "historical or biographical sketch" of the respective subject.