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

Papers of Dr. Albert Leffingwell, including diaries, letters, and manuscripts from the 19th and 20th centuries.
Historical documents, images, and artifacts relating to the Chester, New York community.
The Dunham Family History collection contains portraits, photographs, and various documents saved by the Dunham family.
Historic holiday and birthday greeting cards.
This collection includes documents, images, and postcards relating to the history of Nanuet, New York.