2018 Art in the Pavilion, Mount Vernon Park Association, Alexandria, Virginia

2012 Nature Beckons: Virginia Landscapes, 7 East Art Gallery, Woodstock, Virginia

2009 Theodora Tilton: Paintings of Nature, North Carolina Museum of Natural Sciences, Raleigh, North Carolina

2003 Natural Light, The Art Group Gallery, Mount Jackson, Virginia

2002 Landscapes of Nature, Lobby for the Arts Gallery, Cumberland, Maryland

2002 Current Work, TRW Inc. Corporate Gallery, Reston, Virginia

2001 New Landscapes, LMI Inc. Corporate Gallery, McLean, Virginia

2000 Recent Works/Theodora T. Tilton, First Virginia Bank Corporate Gallery, Falls Church, Virginia

2000 Landscapes, Longstreth and Goldberg Fine Art Inc., Naples, Florida

1999 Theodora T. Tilton–Environmental Land-scapes, The Tuttle Gallery, McDonogh, Maryland

1999 Recent Works by Theodora T. Tilton, The Sheila Atchison Gallery, Birmingham, Alabama

1999 Tilton, Cook, Cummings and Stone, Del-aware Center for the Contemporary Art, Wil-mington, Delaware 

1999 Landscapes, EDS Inc. Corporate Gallery, Herndon, Virginia

1998 Theodora T. Tilton/Recent Work, BTG Inc. Corporate Gallery, Fairfax, Virginia

1998 Theodora T. Tilton/Recent Work, LMI Inc. Corporate Gallery, McLean, Virginia

1997 Looking at Light, paintings by Theodora T. Tilton and Thomas Werner, Marlboro Gallery, Laurel, Maryland