Family
- father Klaus Dunst: Divorced from Dunst's mother
- mother Inez Dunst: Divorced from Dunst's father
- brother Christian Dunst: Born c. 1987
Companions
- Companion Josh Hartnett: Fuelled speculation they're romantically involved after the couple was spotted kissing at the Sundance Film Festival in January 2008
- Companion Andy Samberg: Rumored to have dated in 2006; no longer together
- Ben Foster: appeared together in "Get Over It" (2001); no longer together
- Jake Gyllenhaal: romantically linked in October 2002
- Jake Hoffman: dating as of 1998; son of actor Dustin Hoffman with whom Dunst co-starred in "Wag the Dog" (1997)
- Tobey Maguire: reportedly became romantically involved during filming of "Spider-Man" in 2001
- Companion Johnny Borrell: Singer for the British band Razorlight; dated for several months in 2007; no longer together
