- Beebe collection of Washington family papers, 1818/1861, bulk 1840/18501
- Early Records of the Mount Vernon Ladies' Association, 1853/1951, bulk 1853/18751
- Financial Records of the Mount Vernon Ladies' Association, 1858/20151
- Geo. Gregory Smart collection of Washington and Mount Vernon ephemera, 1793/20171
- Guest Books and Visitor Registers, 1850/20161
- Harrison H. Dodge Papers, 1816/19361
- Historic ephemera collection, 1796/19861
- Historic manuscript collection, 1601/19331
- Historic map collection, 1675/19711
- Historic newspapers collection, 1757/19571
- Historical Photograph Collection, 1850/20101
- Jane Charlotte Blackburn Washington and John Augustine Washington III correspondence, 1837/18611
- John Augustine Washington III and Mount Vernon Ladies' Association (MVLA) collection, 1834/19571
- John Augustine Washington III and family papers, 1789/19941
- Land Records of the MVLA, 1858/20061