The Saurian Expedition of 1905 was a paleontological research mission in northern Nevada in the United States. The expedition recovered many of the most well-preserved specimens of ichthyosaur ever found. Information on the key contributors, details on the expedition itself and its findings can be found below.

Ichthyosauria is an order of large extinct marine reptiles sometimes referred to as "ichthyosaurs", although the term is also used for wider clades in which the order resides.