Here I am providing the list of top 20 Graphic Design Schools of the World which you are looking for .

Academy of Art University
Virginia Commonwealth University School of the Arts
University of Illinois at Chicago School of Art and Design
University of Cincinnati College of Design
Massachusetts College of Art and Design
Boston University School of Visual Arts
School of Visual Arts
Minneapolis College of Art and Design
Kansas City Art Institute
Savannah College of Art and Design
Rochester Institute of Technology College of Imaging Arts and Sciences
Art Center College of Design
UCLA School of Arts and Architecture
Otis College of Art and Design
California College of the Arts
California Institute of the Arts
School of the Art Institute of Chicago
Maryland Institute College of Art Graphic Design\
Parsons School of Design
Pratt Institute