Here is the list of top design schools according to Business week:

Arizona State University (Tempe, Arizona)
Art Center College of Design (Pasadena, CA)
Babson College (Babson Park, Mass)
Bainbridge College Institute (Bainbridge Island, Washington)
California College of the Arts (San Fransisco, CA)
Carnegie Mellon University (Pittsburgh, PA)
Central St. Martins College of Art & Design (London, England)
Cleveland Institute of Art
College for Creative Students (Detroit, Michigan)
Dartmouth College, Thayer School of Engineering
Delft University of Technology (Delft)
Domus Academy (Milan)
ESDI Brazil (Rio De Janeiro)
George Brown College (Ontario Canada)
Georgia Institute of Technology (Atlanta, Georgia)
Design Academy of Eindhoven
University of Illinois (Chicago, Il)
University of Michigan (integrated product development program) (Ann Arbor, Michigan)
University of Toronto (Rotman School of Management)
UC Berkeley (Hass Business School)
UCLA Design and Media Arts (LA, CA)
UMEA Institute of Design (Umea)
University of Art and Design Helsiniki (Helsinki, Finland)
Virginia Commonwealth University (adcenter) (Richmond, Virginia)
University of Oxford, Said School of Business
Zollvereian School of Management and Design (Essen)