The Silurian is the geological period and system lasting roughly from 445 million years ago to 415 million years ago.
Silurian may also refer to:
Silurian, the society, culture, language, and ethnicity of the Silures, an ancient Welsh tribe Silurian, the racehorse that won the 1923 Doncaster Cup The Silurians Press Club, a society established at 1924 by a group of veteran journalists. Silurian (Doctor Who), a fictional race of humanoid reptiles who existed before humanity Doctor Who and the Silurians, a Doctor Who serial Silurian hypothesis, a thought experiment that speculates if a prior advanced civilization on Earth would leave behind present day evidence of its existence Silurian Hills, a small range of hills in the Mojave Desert Siluria Technologies, a San Francisco-based technology company Eriopygodes imbecilla, the Silurian, a moth of the family Noctuidae