The Ice Warriors are a fictional extraterrestrial race of reptilian humanoids in the long-running British science fiction television series Doctor Who. They were originally created by Brian Hayles, first appearing in the 1967 serial The Ice Warriors where they encountered the Second Doctor and his companions Jamie and Victoria. In Doctor Who, the Ice Warriors originated on Mars, which within the series narrative is a dying world. Their early appearances depict the Ice Warriors as attempting to conquer the Earth and escape their planet as early as Earth's Ice Age. A frozen group are discovered by an Earth scientific team, one of whom, Walters, dubs them 'Ice Warriors' in their first appearance. Despite this not being the name of their species, an Ice Lord later refers to his soldiers as Ice Warriors in the 1974 serial The Monster of Peladon. Similarly there is a fleeting reference to themselves as such in The Curse of Peladon. Although originally appearing as villains, subsequent appearances have depicted Ice Warriors that have eschewed violence and even ally themselves with the Doctor. They have also been featured in flashback and cameo appearances, in addition to appearing frequently in spin-off media such as novels and audio releases.

The Ice Warriors is the partly missing third serial of the fifth season of the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 11 November to 16 December 1967.