- Gaius Dickinson Letters, 1791/19301
- Galt Papers (I), 1745/189229
- Galt Papers (III), 1750/199116
- Gamble Papers, Letters and Photographs, 1774/18861
- Garrett Family Papers, 1786/19281
- Garth Family papers, 1798/18724
- Gary Weiner, Collector, Papers, 1773/19381
- Gaspard Monge Portrait Print, 1746/18181
- Geddy-Harris Archive Records, 1773/1959, bulk 1890/19404
- Genealogy Collection, 1880/20011
- General Store in Jefferson County, Virginia Account Ledger, 1800/18011
- Geo. Gregory Smart collection of Washington and Mount Vernon ephemera, 1793/20175
- George A. Baxter Family papers, 1797/19188
- George Baker Family Genealogy, 1793/19521
- George Couchman Family Papers, 1765/19351