- N. J. Pittman Account Book, 1855/18812
- Nancy H. Marshall A Visit From St. Nicholas (The Night Before Christmas) Collection, 1813/20051
- Nancy Randolph Papers, 1805/19621
- Naomi E. Robertson Papers, 1858/19001
- Narcisse Virgile Diaz de la Pena Letter to Emile Cesar Victor Perin, 18732
- Nathan Goff, Jr. (1843-1920) Papers, 1866/18991
- Nathan Hanes (1821-1899) Papers, 1845/19001
- Nathan Ochs Family Papers, 1813/1970, bulk 1884/19241
- Nathaniel Beverley Tucker Papers, 1830/1903, bulk 1850/18903
- Nathaniel C. Wilson collection, 1834/19415
- Nathaniel S. Way manuscript business ledger, 1872/18874
- Nathaniel V. Watkins Family Papers, 1846/1889, bulk 1862/18655
- National Grange of the Order of Patrons of Husbandry (Lewis County, Missouri) Minute Book, 1873/18752
- Native Americans, 1872/19882
- Natural Tunnel, Scott County, Virginia, Collection, 1872/19581