The Woodrow Wilson Collection consists of Wilson holdings which have been acquired by the Princeton University Library Special Collections gradually over many years by purchase and gifts from many sources. The collection is rich in material prior to Wilson's presidential years, although it is not limited to this period; researchers will find materials documenting both the public and private life of Woodrow Wilson. Various types of information written by or about Wilson are present in the collection, including manuscripts, addresses, articles, correspondence, telegrams, legal documents, booklets, pamphlets, photographs, portraits, cartoons, newspapers and scrapbooks.

The Woodrow Wilson Additional Materials consist of materials that the Seeley G. Mudd Manuscript Library has acquired on Woodrow Wilson since the mid-1990s.