Recipients of the Cullum Geographical Medal

William Maurice "Doc" Ewing (May 12, 1906 – May 4, 1974) was an American geophysicist and oceanographer.Ewing has been described as a pioneering geophysicist who worked on the research of seismic reflection and refraction in ocean basins, ocean bottom photography, submarine sound transmission (including the SOFAR channel), deep sea core samples of the ocean bottom, theory and observation of earthquake surface waves, fluidity of the Earth's core, generation and propagation of microseisms, submarine explosion seismology, marine gravity surveys, bathymetry and sedimentation, natural radioactivity of ocean waters and sediments, study of abyssal plains and submarine canyons.

Emmanuel de Martonne (French pronunciation: [ɛmanɥɛl də maʁtɔn], 1 April 1873 – 24 July 1955) was a French geographer. He participated in the Paris Peace Conference.

Chauncy Dennison Harris (1914 - December 26, 2003) was a pioneer of modern geography. His seminal works in the field of American urban geography ("The Nature of Cities" and "A Functional Classification of Cities in the United States") along with his work on the Soviet Union during and after the Cold War era established him as one of the world's foremost urban geographers. He also made significant contributions to the geographical study of ethnicity, specifically with respect to non-Russian minorities living within the Soviet Union. Harris traveled regularly to the Soviet Union and played a key role in establishing a healthy dialog between Soviet and American scholars.

Hugh Robert Mill (28 May 1861 – 5 April 1950) was a British geographer and meteorologist who was influential in the reform of geography teaching, and in the development of meteorology as a science. He was President of the Royal Meteorological Society for 1907/8, and President of the Geographical Association in 1932.