- Gabriel Galt Williamson collection, 1825/19392
- Gaius Dickinson Letters, 1791/19301
- Galt Papers (I), 1745/189219
- Galt Papers (III), 1750/199131
- Galt Papers (IV), 1819/18751
- Gamble Papers, Letters and Photographs, 1774/18861
- Garrett Family Papers, 1786/19284
- Garth Family papers, 1798/187214
- Gary Weiner, Collector, Papers, 1773/19381
- Geddy-Harris Archive Records, 1773/1959, bulk 1890/19404
- Genealogy Collection, 1880/20014
- Geo. Gregory Smart collection of Washington and Mount Vernon ephemera, 1793/20175
- Geographical, Statistical, and Historical Map of Virginia, 1824/18271
- George A. Baxter Family papers, 1797/191810
- George A. White Mathematics Textbook, 1823/18432