A geologist is a contributor to the science of geology.

The following is a list of famous geologists

• Otto Wilhelm Hermann von Abich (1806-1886)
• Louis Agassiz (1807-1873), work on ice ages, glaciers
• Walter Alvarez (b. 1940)
• Mary Anning
• Adolphe d'Archiac (1802-1868)
• Giovanni Arduino (1714-1795), first classification of geological time
• Etheldred Benett
• Pierre Berthier, discovered the properties of Bauxite
• Norman L. Bowen (1887-1956)
• John C. Branner
• J. Harlan Bretz
• William Branwhite Clarke (1798-1878)
• William Conybeare (1787-1857)
• James Dwight Dana (1813-1895)
• Charles Darwin (1809 - 1882)
• George Mercer Dawson (1849-1901)
• John William Dawson (1820-1899)
• Arthur L. Day
• Henry De la Beche (1796-1855)
• Nicolas Desmarest (1725-1815)
• Robert Dietz
• Jean-Baptiste Elie de Beaumont (1798-1874)
• Walter Frederick Ferrier (1865-1950)
• Alexander Henry Green (1832-1896)
• Julius von Haast (1824-1887)
• Sir James Hall (1761-1832), did research on molten rock
• W. Brian Harland (1917 - 2003)
• Harry Hess (1906-1969)
• Arthur Holmes (1890-1965)
• M. King Hubbert (1903-1989)
• James Hutton (1726-1797), father of modern geology
• Danie G. Krige inventor of kriging.
• William Edmond Logan (1798-1875)
• Sir Charles Lyell
• William Maclure (1763-1840)
• Floyd Warren McCoy, Jr
• Friedrich Mohs
• W. Jason Morgan
• Roderick Murchison
• Joseph Pardee
• R.A.F. Penrose, Jr.
• John Phillips (1800-1874)
• Ferdinand_Baron_Von_Richthofen 1833-1905
• Charles Richter
• Harrison Schmitt, Apollo_17 moonwalker.
• Adam Sedgwick
• William Smith
• Nicolas Steno : (1638-1686) pioneer in early-modern geology
• Eduard Suess
• Alfred Wegener
• Josiah Whitney (1819-1896), chief of the California Geological Survey
• John Williamson (1907-1958), founder of the Williamson diamond mine
• J. Tuzo Wilson
• Harry M. Woodward (c.1938), did work with respect to the Old Faithful Geyser