"I am very saddened to inform all of those that loved her, of which there are many, that Ivana Trump has passed away at her home in New York City," Donald Trump said in a post on the social medial platform Truth Social.
The couple married in 1977 and divorced in 1992. They had three children together: Donald Jr., Ivanka and Eric.
"Ivana Trump was a survivor. She fled from communism and embraced this country. She taught her children about grit and toughness, compassion and determination," the Trump family said in a statement quoted by ABC News. She grew up under Communist rule in the former Czechoslovakia.
Neither the Trump family statement nor the post from the former president mentioned the cause of her death.
(Reporting by Kanishka Singh in Washington; Editing by Tim Ahmann)

epa04926352 Ivana Trump, (3-R) ex-wife of Republican presidential hopeful Donald Trump attends the Zang Toi runway show during Fashion Week in New York, New York, USA, 11 September 2015. The Spring/Summer 2016 collections are presented from 10 to 17 September. EPA/STEPHEN CHERNIN