Geisel may refer to: * Ernesto Geisel (1907–1996), Brazilian military general and politician * Orlando Geisel (1905–1979), Brazilian general and Minister of the Army, Ernesto's brother * Dr. Seuss, pen name of Theodor Seuss Geisel (1904–1991), a children's book author * Theo Geisel (physicist) (born 1948), German physicist * Geisel (river), Saxony-Anhalt, Germany * Geisel valley, the valley of the river Geisel * Geisel Library, the main library building at the University of California San Diego, named after Dr. Seuss

See also