MonsterQuest is an American television series that originally aired from October 31, 2007 to March 24, 2010 on the History channel. Produced by Whitewolf Entertainment, the program deals with the search for various monsters of interest to the cryptozoology subculture and paranormal entities reportedly witnessed around the world. A spin-off show, MysteryQuest, which focuses on unsolved mysteries, premiered on September 16, 2009.

Cryptozoology is a pseudoscience and subculture that searches for and studies unknown, legendary, or extinct animals whose present existence is disputed or unsubstantiated, particularly those popular in folklore, such as Bigfoot, the Loch Ness Monster, Yeti, the chupacabra, the Jersey Devil, or the Mokele-mbembe. Cryptozoologists refer to these entities as cryptids, a term coined by the subculture. Because it does not follow the scientific method, cryptozoology is considered a pseudoscience by mainstream science: it is neither a branch of zoology nor of folklore studies. It was originally founded in the 1950s by zoologists Bernard Heuvelmans and Ivan T. Sanderson.