- Tate Thompson Brady Family papers, 1785/20052
- Tax reports of public service corporations from the State Corporation Commission, 1895/20151
- Temple Beth El scrapbooks, 1959/20097
- Terrill-Porterfield Families, Papers regarding the Civil War and Other Material, 1716/1994, bulk 1840/19201
- Terry Burton, Collector, Ogden House Collection, 1886/19971
- Terry L. Meyers papers, 1988/20105
- Thad W. Tate papers, 1949/20092
- Thaddeus Podratsky, Collector, Records Regarding the Socialist Party, 1911/2006, bulk 1911/19371
- The Center for Nursing Historical Inquiry collection, 1934/200110
- The Edgar Cayce Readings, 1886-20201
- The Eric Shoaf Tom Wolfe collection1
- The Fairfax County Office of Comprehensive Planning Heritage Resources Branch Slide Collection, 1967-199318
- The Flat Hat records, 1911/20193
- The Greenbrier (Resort), West Virginia, Menus, 1973/19862
- The Grove Renovation Records, 1900/20081