Gertrude Falk (August 24, 1925 – March 9, 2008) was an American physiologist, who was Professor of Physiology at University College London, and the first woman to work in her field at UCL Medical School. Born to immigrant parents in the United States, she was the first in her family to enroll at University, earning Bachelor of Science and Doctor of Philosophy degrees. Falk worked at the University of Illinois College of Medicine, University of Washington and UCL Medical School.