Conge's work is known internationally and he is represented in public and university collections in the United States, Europe, Japan and China including:

  • Museum of Modern Art - Toyama, Japan
  • Musee de la Publicite - Paris, France
  • Lahti Poster Museum - Lahti, Finland
  • Moravian Gallery - Brno, Czechoslovakia
  • Colorado State University - Fort Collins, CO
  • International Poster Museum - Warsaw, Poland
  • The German Poster Museum - Essen, Germany
  • Norfolk Museum of Arts and Sciences - Norfolk, VA
  • State University at Cortland - Cortland, NY
  • Everson Museum of Art - Syracuse, NY
  • Marine Midland Trust Company - Syracuse, NY
  • Mobil Chemical Corp.- New York, NY
  • Syracuse University - Syracuse, NY
  • University of Rochester - Rochester, NY
  • Dansk Poster Museum - Aarhus, Denmark
  • Colorado State University Libraries, Kluge Project, Fort Collins, CO
  • University of Utah, Marriott Library, Salt Lake City, UT
  • University of Connecticut, School of Fine Arts - Storrs, CT