Family
- daughter Ramona Sarsgaard: Born Oct. 3, 2006; father, Peter Sarsgaard
- father Stephen Gyllenhaal:
- mother Naomi Foner:
- brother Jake Gyllenhaal: Born in 1980; co-starred with Maggie in "Donnie Darko" (2001)
Companions
- : Dating un-named person "in the entertainment industry" as of August 2002
- : Had live-in boyfriend during college who was a painter; no longer together
- Peter Sarsgaard: reportedly engaged as of December 2002
