Le opere di Karen sono presenti in oltre 40 collezioni permanenti:

​​

Alexander Tutsek Foundation  |  Munich, Germany.

Alturas Foundation  |  San Antonio, Texas

Barry Art Museum   |  Old Dominion University  |  Norfolk, Virginia

Boston Museum of Fine Art  |  Boston, Massachusets 

Chazen Museum of Art  |  Madison, Wisconsin

Chrysler Museum of Art  |  Norfolk, Virginia

Cincinnati Art Museum  |  Cincinnati, Ohio

The Corning Museum of Glass  |  Corning, New York

Crystal Bridges Museum of American Art  |  Bentonville, Arkansas

de Young Fine Arts Museum of San Francisco  |  San Francisco, California

Flint Institute of Arts  |  Flint, Michigan

Frederik Meijer Gardens & Sculpture Park  |  Grand Rapids, Michigan

The Henry Ford Museum  |  Dearborn, Michigan

Hunter Museum of American Art  |  Chattanooga, Tennessee

Imagine Museum  |  St. Petersburg, Florida

Iowa State University Museum  |  Ames, Iowa

Jordan Schnitzer Foundation  | Portland, Oregon

Museum Kunstpalast  |  Düsseldorf, Germany

Knoxville Museum of Art  |  Knoxville, Tennessee

Lowe Art Museum, University of Miami  |  Miami, Florida

Montgomery Museum of Art  |  Montgomery, Alabama

Musée des Arts décoratifs  |  Paris, France

Musée du Verre  |  Sars-Poteries, France

Museum Kunstpalast  |  Düsseldorf, Germany

Museum of American Glass  |  Millville, New Jersey

Museum of Glass  |  Tacoma, Washington 

National Gallery of Australia  |  Canberra

North Carolina Museum of Art
  |  Raleigh, North Carolina

Oklahoma City Museum of Art  |  Oklahoma City, Oklahoma

Palm Springs Art Museum  |  Palm Springs, California

Palmer Museum of Art  |  University Park, Pennsylvania 

Peabody Essex Museum
  |  Salem, Massachusetts

Racine Museum of Art  |  Racine, Wisconsin

Ringling Museum of Art  |  Sarasota, Florida

Seven Bridges Foundation  |  Greenwich, Connecticut

Smithsonian Museum of American Art, Renwick Gallery  |  Washington DC

Speed Art Museum  |  Louisville, Kentucky

Spencer Museum of Art  |  Lawrence, Kansas

Toledo Museum of Art  |  Toledo, Ohio

Tucson Museum of Art  |  Tucson, Arizona

Vero Beach Museum of Art  |  Vero Beach, Florida

​