Elias Koteas (born March 11, 1961) is a Canadian actor, known for his roles as Alvin "Al" Olinsky on the series Chicago P.D., Tom True on Goliath, Lionel Shrike in Now You See Me (2013), Col. Marks on Combat Hospital, James Skinner on The Killing, Laeddis in Shutter Island (2010), Monsieur Gateau in The Curious Case of Benjamin Button (2008), Jack Payne in the film Shooter (2007), Peter Brandt in Collateral Damage (2002), Capt. James Stars in The Thin Red Line (1998), Edgar Reese in Fallen (1998), Antonio Freeman in Gattaca (1997), and Casey Jones in two of the original Teenage Mutant Ninja Turtles films.

He won the Canadian Screen Award for Best Supporting Actor for his role in the film Ararat (2002). He has appeared in many films including Some Kind of Wonderful (1987), The Adjuster (1991), Exotica (1994), The Prophecy (1995), Crash (1996), Living Out Loud (1998), Harrison's Flowers (2002), Zodiac (2007), and Skinwalkers (2007).