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