Shane Patrick Mahan (born September 22, 1964) is an American special effects creator, creature designer, puppeteer, and producer known for his work at Stan Winston Studio and its successor, Legacy Effects. His film credits include The Terminator and Terminator 2: Judgement Day; Aliens; Predator and Predator 2; The Lost World: Jurassic Park; Iron Man, Iron Man 2 and Iron Man 3; Pacific Rim and The Shape of Water.

Mahan was born and raised in Greenville, Michigan. After graduating from Greenville High School in 1981, he left for Hollywood. His first job was with Stan Winston Studios as a crew member working on The Terminator in 1983.