Family
- father Timothy Affleck: Divorced from Affleck's mother c. 1984; underwent treatment for alcohol addiction
- mother Chris Affleck: Divorced from Affleck's father c. 1984
- brother Casey Affleck: Born Aug. 12, 1975; directed by brother in "Gone Baby Gone" (2007)
- daughter Seraphina Rose Elizabeth Affleck: Born Jan. 6, 2009; mother, Jennifer Garner
- daughter Violet Affleck: Born Dec. 1, 2005; mother, Jennifer Garner
Companions
- wife Jennifer Garner: Met in 2003, while working together on "Daredevil" (2003); began dating in 2004; engaged April 2005; married Wednesday June 28, 2005, at the Parrot Cay resort in the Caribbean islands of Turks and Caicos
- Cheyenne Rothman: dated on and off since high school; broke up in the fall of 1997
- Gwyneth Paltrow: began dating in December 1997; co-starred together in "Shakespeare in Love"; reportedly separated in December 1998; later worked together in "Bounce" (2000), fueling speculation they had reconciled
- Jennifer Lopez: reportedly dating in July 2002; engaged as of November 2002
- Shoshonna Lonstein: reportedly dated in fall 2000
- Companion Enza Sambataro: Met at a fund-raiser in a Boston bowling alley; briefly dated in 2004
