- Beebe collection of Washington family papers, 1818/1861, bulk 1840/18501
- Elizabeth Bordley Gibson collection, 1794/18512
- Esther Maria Lewis Chapin collection of Washington family documents, 1743/18526
- Geo. Gregory Smart collection of Washington and Mount Vernon ephemera, 1793/20177
- Harrison H. Dodge Papers, 1816/19363
- Historic ephemera collection, 1796/19864
- Historic manuscript collection, 1601/193314
- Historic map collection, 1675/19711
- Historic newspapers collection, 1757/195715
- Historical Photograph Collection, 1850/20101
- John Augustine Washington III and Mount Vernon Ladies' Association (MVLA) collection, 1834/19572
- John Augustine Washington III and family papers, 1789/19947
- Land Records of the MVLA, 1858/20061
- Lawrence Lewis family papers, 1785/18585
- Lawrence Washington collection of Washington family papers, 1787/19321