The hospital did not provide a cause of death, but media reports said he had been admitted with kidney problems.
Betancur, a member of the Conservative party who served from 1982 to 1986 - one of Colombia's bloodiest periods - had sought a negotiated peace accord with the Revolutionary Armed Forces of Colombia (FARC), the National Liberation Army (ELN) and M-19 rebels.
Talks with M-19 ended abruptly in November 1985, when the rebel group stormed the Supreme Court and took hundreds of hostages, including the justices. About 100 people died in the siege when the military raided the building, 12 of whom were magistrates
"I deeply regret the death of a great friend, a great Colombian, former President Belisario Betancur. His legacy in politics, in our history, in culture is an example for all future generations. Our condolences to your family and friends," President Ivan Duque said on Twitter.
Peace with the FARC was finally agreed in late 2016, while the M-19 demobilized in 1990. The ELN is still an active guerrilla army.
(Reporting by Helen Murphy Editing by Bill Berkrot)
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