2023

· Nature's Wonders, 1515 Lincoln Gallery, Oklahoma City, Oklahoma. August 17th-September 23rd, 2023.

2021

· Invitational Solo Art Exhibition: Water and Land ll, Mainsite Contemporary Art Gallery, Norman, Oklahoma. January –February 13, 2021

2020

· Invitational Solo Art Exhibition: Water and Land, Firehouse Art Center, Norman, April, 2020

2019

· ​Reflections of the Wichita's: Oils and Watercolors by Katherine Liontas-Warren, The Museum of the Western Prairie, Altus, Oklahoma. October- January 2020

​2016

· A Journey of Discovery, Katherine Liontas-Warren, Oklahoma City University, Nona Jean Hulsey Gallery, Oklahoma. August-October.

· A Homecoming of Journeys and Creativity, Katherine Liontas-Warren, Pride Gallery, Southwestern Medical Center, Lawton, Oklahoma. October- January

2015

· Katherine Liontas-Warren: A Creative Doorway. Wichita Falls Museum Of Art At MWSU. Wichita Falls, Texas. November-February.

2014

· Katherine Liontas-Warren: Paintings, Drawings, and Prints. Ponca City Art Center. Ponca City. October-November.

· Katherine Liontas-Warren: Paintings and Drawings, Faculty Exhibition at Cameron University, Art Gallery. August

2013

· New Works by Katherine Liontas-Warren at the Paseo Originals Art Gallery, Oklahoma City. November.

2012

· Katherine Liontas-Warren: Oklahoma Perspectives. A solo retrospective exhibition of drawings, prints, and paintings will be displayed at the Mabee-Gerrer Museum of Art in Shawnee, Oklahoma. May – June.

2011

· Katherine Liontas-Warren: New Drawings, Paintings, and Prints. Kemp Art Center, Texas. April- July.

2010

· Katherine Liontas-Warren and Monika Linehan: An Exhibition of Portrait and Figurative Drawings funded by a research grant from Cameron University. Art Department. August.

· Katherine Liontas-Warren, An Exhibition of prints and drawings. Oklahoma City Capitol, north gallery. December- February.

2009

· Katherine Liontas-Warren, An Exhibition of New drawings and prints. JRB Art Gallery, Oklahoma City, Oklahoma. April.

2008

· Katherine Liontas-Warren, An Exhibition of New drawings and prints. Leslie Powell Gallery. Lawton, Oklahoma. May-June.

2004

· Landscapes from the Heart, An Exhibition of drawings and prints. East Central University, Ada. Director: Brad Jessop, art department chair. February-March

2003

· Landscapes from the Heart, An Exhibition of drawings and prints. Longview Museum. Curator: Renee Hawkins. Longview, Texas. November and December.

· Landscapes from the Heart, An Exhibition of Drawings and prints. Midwestern State University Art Gallery. Wichita Falls, Texas. September – October.

2002

· Wichita Solstice: Wichita Mountains. Works by Katherine Liontas-Warren and Jack Bryan. Leslie Powell Art Gallery. Lawton. December-January

1999

· Part of a Greater Whole: Work by Two Artists: Katherine Liontas-Warren and Kim Springer-Smith. Leslie Powell Art Gallery. Lawton, Oklahoma.

1996

· Fables, Dreams and Stories: Work by Three Artists: Katherine Liontas-Warren, Malcolm Christhilf and Susan Galey. Leslie Powell Art Gallery. Lawton, Oklahoma.

1992

· Four Southerners: Goddard Center for the Visual and Performing Arts. Director: Mort Hamilton. Ardmore, Oklahoma.

· Drawings and Prints: Kirkpatrick Museum. Gallery Director: Jim Eastep. Oklahoma City, Oklahoma.

· Prints and Drawings: Presbyterian Art Gallery. Presbyterian Hospital. Oklahoma City.

· Prints and Drawings: Flips. Gallery Director: Gale Riggs. Dallas, Texas.

1991

· Drawings and Prints: Kilgore College. Gallery Director: John Hillier. Kilgore, Texas.

· Drawings and Prints: Leslie Powell Art Gallery. Gallery Director: Nancy Anderson. Lawton, Oklahoma.

1990

· Drawings and Prints: Moorhead State University. Center for the Arts Gallery. Moorhead, Minnesota.

· Prints and Drawings: Odessa College. Curator: Barry Phillips III. Odessa, Texas.

· Recent Works: Individual Artists of Oklahoma Gallery. Oklahoma City, Oklahoma.

· Lithographs and Drawings: Flips. Gallery Director: Gale Riggs. Oklahoma City, Oklahoma.

1989

· Drawings and Prints: Ball State University. Theater Gallery. Muncie, Illinois​

• The Wichita Falls Museum of Art, at Midwestern State University. Permanent Collection.

• Texas Tech Museum, Lubbock, Texas. Permanent collection.

• The University of Texas at Tyler. Meadows Gallery. Permanent Collection.

• University of Science and Arts of Oklahoma. Art Gallery.Permanent Collection. Chickasha.

• Milwaukee Museum of Art. Colorprint USA 1998. Print Portfolio.

• Whitman College in Walla Walla, Washington. Colorprint USA. Print Portfolio.

• Austin Peay University. Trahern Gallery. Permanent Collection. Purchase Award.Clarksville. Tennessee.

• Portrait/Landscape of W.C. Austin, Quartz Mountain Lodge, Adult Arts Institute of Oklahoma. Permanent Collection.

• Color Print USA, A 50 State Portfolio Invitational Exchange, Texas Tech University,Permanent Collection.

• Del Mar College, Permanent Collection, Purchase Award, Corpus Christi, Texas.

• The Leslie Powell Art Foundation, Purchase Award, Permanent Collection. Lawton, Oklahoma

• Oklahoma State University, Gardiner Gallery, Purchase Award, Permanent Collection. Stillwater, Oklahoma.

• Arkansas Art Center, Purchase Award, Permanent Collection. Little Rock, Arkansas.

• Comanche Memorial Hospital. Permanent Collection. Lawton, Oklahoma

• Butler Community College, President. Permanent Art Collection. El Dorado, Kansas

• Oklahoma Suite 1996, A portfolio exchange, Fred Jones Art Museum, Norman

• Mabee Gerrer Museum of Art, Shawnee, Oklahoma