Jason Isaacs (born 6 June 1963) is an English actor and producer. He is known for playing Lucius Malfoy in the Harry Potter film series, Colonel William Tavington in The Patriot, and criminal Michael Caffee in the Showtime series Brotherhood. In December 2016, he played "Hap" Percy in the Netflix supernatural series The OA. He currently plays Captain Gabriel Lorca, the commanding officer of the USS Discovery in Star Trek: Discovery and provides the voice of The Inquisitor, Sentinel, in Star Wars Rebels, the animated television series.

Outside of film and television, his stage roles include Louis Ironson in Declan Donnellan's 1992 and 1993 Royal National Theatre London premières of Parts One (Millennium Approaches) and Two (Perestroika) of Tony Kushner's Pulitzer Prize-winning play Angels in America: A Gay Fantasia on National Themes, and as Ben, one of two hitmen, playing opposite Lee Evans as Gus, in Harry Burton's 50th-anniversary revival of Nobel Laureate Harold Pinter's 1957 two-hander The Dumb Waiter at Trafalgar Studios in the West End. He starred in the NBC drama Awake as Detective Michael Britten from March to May 2012.