Family
- father Salvatore Travolta: (1913-1995); semi-professional football player turned tire salesman and partner in a tire company
- mother Helen Travolta: Irish-American; appeared in The Sunshine Sisters, a radio vocal group; acted and directed before becoming a high school drama and English teacher; was director of a summer theater until her family grew to six children; was 42 when John, the last child, was born; died of cancer in 1979
- sister Ellen Travolta: Older
- brother Sammy Travolta: Older
- sister Annie Travolta: Older
- brother Joey Travolta: Older
- sister Margaret Travolta: Older
- son Jett Travolta: Born April 13, 1992; mother, Kelly Preston; suffered from Kawasaki disease; died Jan. 02, 2009 after suffering from a seizure at his family's vacation home at the Old Bahama Bay Hotel on Grand Bahama Island
- daughter Ella Bleu: Born April 3, 2000; mother, Kelly Preston
Companions
- Diana Hyland: 18 years Travolta's senior; met while co-starring in TV-movie "The Boy in the Plastic Bubble"; died of cancer on March 28, 1977
- Marilu Henner: met while touring in "Grease" in 1972; had on-again, off-again relationship until 1985
