- Source of Wealth: Film, Television
- Age: 56
- Height: 5′ 11″ (1.80 m)
- Marital Status: Married (Emma Hewitt)
- Full Name: Jason Isaacs
- Nationality: United Kingdom
- Date of Birth: June 6, 1963
- Ethnicity: English
- Occupation: Actor
- Education: Bristol University
- Children: 2 (Lily Isaacs, Ruby Isaacs)
Jason Isaacs is an English actor best recognized for his appearance in the Harry Potter film series as the Death Eater Lucius Malfoy. He is also noted for his work in The Patriot as William Tavington as well as on Brotherhood, an American TV series where he played the role of Michael Caffee. Since 2011, he has been appearing on Case Histories, a role that won him a Satellite Aware for Best Actor in a Miniseries or a Motion Picture Made for Television.