Simian refers to the infraorder Simiiformes, the higher primates: the monkeys and the apes, including humans.

Simian may also refer to:

• Simian (band), an English electro-rock band
• Simian (broadcasting), a playout system used in the radio broadcasting industry
• Simian Records, a record company founded by Elijah Wood
• SIMIlarity ANalyser, a framework for finding duplicated programming code.
• Simian (software), a webbased information management platform.

Şimian may refer to several places in Romania:

• Şimian, Bihor, a commune in Bihor County
• Şimian, Mehedinţi, a commune in Mehedinţi County
• Şimian (island), an island on the Danube

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