- Galt Papers (I), 1745/189213
- Galt Papers (III), 1750/199112
- Gamble Papers, Letters and Photographs, 1774/18861
- Garrett Family Papers, 1786/19281
- Gary Weiner, Collector, Papers, 1773/19381
- Gaspard Monge Portrait Print, 1746/18181
- Geddy-Harris Archive Records, 1773/1959, bulk 1890/19404
- Geo. Gregory Smart collection of Washington and Mount Vernon ephemera, 1793/20171
- George Couchman Family Papers, 1765/19351
- George Frederick Holmes Papers, 1790/1898, bulk 1842/18873
- George Mason Papers, 1706/18582
- George Mason University Student Government records, 1968/20191
- George Washington Facsimiles, 1775/17961
- George Washington Lewis papers, 1805/19661
- George Washington Papers [in part: photostats, printed copies, typescripts], 1755/19323