 Illingworth's legacy includes the University of Glasgow's Illingworth Prize, which he established in 1964, "awarded annually on the recommendation of the Regius Professor of Surgery" for displays of "scholarship and general achievement" by a third-year medical student.Illingworth and his family's connections with Tenovus-Scotland continue to be commemorated by one of its grants, the Lady Illingworth Award.The impact of Illingworth on his profession was summed up in an obituary written in 2008 for one of his students and successors