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

Simian may also refer to:

• Șimian (island), an island on the Danube, in Romania
• Șimian, Bihor, a commune in Bihor County, Romania
• Șimian, Mehedinți, a commune in Mehedinţi County, Romania
• Simian Mountain, in Jiangjin, Chongqing

• Ng Ser Miang, also known as Huáng Sīmián

• Simian shelf, a bony thickening on the front of the ape mandible
• Single transverse palmar crease, also known as a simian crease orsimian line

• Simians (Chinese poetry), monkeys, gibbons, and other primates in Chinese poetry

• Simian (band), an English electronic group
• Simian Mobile Disco, an English electronic music duo and production team
• Simian Records, a record company founded by Elijah Wood

• "The Night of the Simian Terror" (1968), an episode of the television series Wild, Wild West
• The Simian Line (2001), an American improvisational film

• Simian (software), open-source Mac OS X software deployment utility
• Simian broadcast automation software, by Broadcast Software International

• Ethiopian wolf, also called a simian jackal

• Simeon (disambiguation)
• Simien (disambiguation)
• Simion, a Romanian name