Jim Hutton was married to Maryline Adams (née Poole), who was a teacher. They divorced in 1963. They had two children: a daughter, Heidi (born 1959), and a son, Timothy (born 1960). Timothy also became an actor and appeared with his father in a summer-stock production of Harvey.
In 1970, he married Lynni Solomon, and they had daughter Punch Hutton (former deputy fashion editor of Vanity Fair).
Hutton also had an intermittent 15-year relationship with actress and model Yvette Vickers.
On June 2, 1979, Hutton died of liver cancer, two days after his 45th birthday, and four weeks and a day after being diagnosed.