Thomas Condon (1822–1907) was an Irish Congregational minister, geologist, and paleontologist who gained recognition for his work in the U.S. state of Oregon.

[6] Condon arrived in New York City from Ireland in 1833 and graduated from theological seminary in 1852, after which he traveled to Oregon by ship.

[6] He corresponded with noted scientists, including Spencer Baird of the Smithsonian, Edward Cope of the Academy of Natural Sciences, Joseph Leidy, O.C.

[9] In The Two Islands and What Came of Them, a geology book published in 1902, Condon wrote about two widely separated regions of Oregon that contain its oldest rocks, the Klamath Mountains in the southwestern part of the state and the Blue Mountains in the northeast.

[14] Condon Elementary School (1950-1983) in Eugene still stands as the University of Oregon's Agate Hall.