The Paltsits Ulster County Collection is made up of a wide variety of materials related to the history of Ulster County, New York. All items were collected by Dr. Victor Hugo Paltsits (1867-1952), an archivist and librarian who was, at one time, head of the Manuscripts Division of the New York Public Library.

Materials within the collection date from the mid-seventeenth through the early nineteenth century. Examples include deeds and other land papers, surveys, court documents, notes, accounts, meeting and court minutes, petitions, reports, maps, receipts, letters, church pledges, marriage records, election tallies and genealogical notes. A large portion of the collection relates to property transactions. Activities of the Dutch Reformed Church are also prominent. In addition to church financing and construction papers, there are also items that relate to the split within the Church (1754-1771) between the Coetus Party (mostly American-born members who favored independence from Amsterdam) and the Conferentie Party (mostly immigrants from the Netherlands who sought to maintain the status quo).

Many of the documents are written in Dutch. The condition of materials in this collection is mixed. Quite a number of items are fragile, while others are in fair to good condition. There are several oversized items in Box 2.