Family
- brother Adrian Johansson: Older
- father Karsten Johansson: Danish; had bit role in "Manny & Lo" (1996)
- mother Melanie Johansson: Born to a Jewish family in the Bronx; had bit role in "Manny & Lo" (1996)
- sister Vanessa Johansson: Had bit role in "Manny & Lo" (1996)
- brother Hunter Johansson: Twin of Scarlett; had bit part in "Manny & Lo" (1996)
Companions
- Companion Josh Hartnett: Met while filming "The Black Dahlia" (2006); reportedly split in November 2006
- Companion Jared Leto: Dated in 2004; no longer together
- husband Ryan Reynolds: Began dating in Summer 2007; married Sept. 27, 2008, at a remote wilderness resort outside Vancouver, just four months after announcing their engagement
- Companion Benicio Del Toro: Rumored to have had a sexual liaison in an elevator at the 2005 Oscars; Johansson denied the incident occured
- Companion Patrick Wilson: Dated for more than a year; no longer together
