- Beebe collection of Washington family papers, 1818/1861, bulk 1840/18502
- Early Records of the Mount Vernon Ladies' Association, 1853/1951, bulk 1853/18757
- Elizabeth Bordley Gibson collection, 1794/18513
- Esther Maria Lewis Chapin collection of Washington family documents, 1743/18523
- Geo. Gregory Smart collection of Washington and Mount Vernon ephemera, 1793/201710
- Guest Books and Visitor Registers, 1850/20162
- Harrison H. Dodge Papers, 1816/19363
- Historic ephemera collection, 1796/19867
- Historic manuscript collection, 1601/193316
- Historic map collection, 1675/19711
- Historic newspapers collection, 1757/195717
- Historical Photograph Collection, 1850/20105
- Jane Charlotte Blackburn Washington and John Augustine Washington III correspondence, 1837/18619
- John Augustine Washington III and Eleanor Love Selden correspondence, 1842/18607
- John Augustine Washington III and Mount Vernon Ladies' Association (MVLA) collection, 1834/19575