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

The Anna E. Wilcox Collection of Civil War letters consists of forty-five letters on forty-four separate sheets, eight photographs, four envelopes which could not be matched to any letters, and ancillary materials.
The Fayetteville Free Library Postcard Collection is a representative sample of postcards, featuring historic images of the Fayetteville village streetscape dating back to the early 19th century.
Historic photographs of various military installations on Montauk.
The New York Ordnance Works Collection consists of photographs, maps, and official documents related to the New York Ordnance Works (NYOW), which was in active production during World War II.
Digital version of a journal kept by Angelo Solimino during his service in World War II.