Kiefer William Frederick Dempsey George Rufus Sutherland (born 21 December 1966) is a Canadian actor and musician. He is best known for his starring role as Jack Bauer in the Fox drama series 24 (2001–2010, 2014), for which he won a Primetime Emmy Award and a Golden Globe Award.

Born to actors Donald Sutherland and Shirley Douglas, he got his first leading film role in the Canadian drama The Bay Boy (1984), which earned him a Genie Award nomination. He has since appeared in such films as Stand by Me (1986), The Lost Boys (1987), Young Guns (1988), Flatliners (1990), A Few Good Men (1992), The Three Musketeers (1993), Freeway (1996), A Time to Kill (1996), Dark City (1998), Phone Booth (2002), Melancholia (2011), Pompeii (2014), and The Caine Mutiny Court-Martial (2023).

He has also starred in the Fox drama Touch (2012–2013), and provided the facial motion capture and voice for Venom Snake in the video games Metal Gear Solid V: Ground Zeroes (2014) and Metal Gear Solid V: The Phantom Pain (2015). From 2016 to 2019, he starred in the ABC/Netflix political drama series Designated Survivor. Sutherland has been inducted to the Hollywood Walk of Fame and to Canada's Walk of Fame, and has received a Lifetime Achievement Award at the Zurich Film Festival.