George Mendonsa fell and had a seizure at the assisted living facility in Middletown, Rhode Island, where he lived with his wife of 70 years, his daughter Sharon Molleur told The Providence Journal.
Mr Mendonsa was shown kissing Greta Zimmer Friedman, a dental assistant in a nurse’s uniform, on August 14 1945.
Known as VJ Day, it was the day Japan surrendered to the United States.
People spilled into the New York City streets to celebrate the news.
Mr Mendonsa planted a kiss on Ms Friedman, whom he had never met.
The photo by Alfred Eisenstaedt was first published in Life magazine and became one of the most famous photographs of the 20th century.
It is called V-J Day In Times Square, but is known to most as The Kiss.
Several people later claimed to be the kissing couple.
It was years before Mr Mendonsa and Ms Friedman were confirmed to be the couple.
Mr Mendonsa served on a destroyer during the war and was on leave when the end of the war was announced.
He has said Ms Friedman reminded him of nurses on a hospital ship that he saw care for wounded sailors.
Mr Mendonsa died two days before his 96th birthday.
Ms Friedman fled Austria during the war as a 15-year-old girl.
She died in 2016 at the age of 92 at a hospital in Richmond, Virginia, from complications of old age.