- Early Records of the Mount Vernon Ladies' Association, 1853/1951, bulk 1853/18751
- Executive letter books of Governor Philip W. McKinney, 1890-18931
- Financial Records of the Mount Vernon Ladies' Association, 1858/20151
- Gustavus A. Myers Papers, 1834/18691
- Historic manuscript collection, 1601/19333
- Historical Photograph Collection, 1850/2010283
- Invitation to the 196th Anniversary of George Washington's Gift to Liberty Hall Academy, 19921
- Kellogg Foundation Files, Farm Project, 1984/19991
- Lawrence Lewis family papers, 1785/18583
- Mount Vernon Black and White Film Collection, 1933/2005130
- Mount Vernon Inn Complex Construction Project Files, 1995/20011
- Mount Vernon maps, 1766/19351
- Robert Waldsmith Collection of stereographs and cabinet cards, 1856/198119
- Sarah Tracy Collection, 1859/18683