Serafim Guimarães, full name Serafim Correia Pinto Guimarães, (born May 2, 1934) is a Portuguese physician and pharmacologist.
With his colleague Walter Osswald (born 1928) he made the Department of Pharmacology, Medical Faculty of the University of Porto, a center of research on catecholamines and the sympathetic nervous system, especially their relation to blood vessels.