Portland State University Commencement 2013Portland State University's College of Liberal Arts & Sciences Graduation Ceremony. PSU graduated 6,180 students on Sunday at the Rose Garden, the largest class in Oregon history. The large number of graduates necessitated two separate back-to-back ceremonies. The Class of 2013 came from 49 states and 50 nations, and ranged in age from 16 to 72 years old.