The news came from an official statement from Bush's office late Friday evening.
Mr Bush only served one term as President.
Bush was a World War II naval pilot who survived being shot down over the Pacific, led the Central Intelligence Agency and spent eight years as vice president before taking the Oval Office.
Mr Bush was the president who led the United States at the end of the Cold War.
George P. Bush, the former president's grandson, tweeted in memoriam on early Saturday morning.
"Through his essential authenticity, disarming wit, and unwavering commitment to faith, family and country, President Bush inspired generations of his fellow Americans to public service - to be, in his words, 'a thousand points of light, '" the statement reads.
They were married for 73 years.
Climate change linked to natural disasters
The report found that climate change will cost the United States hundreds of billions of dollars annually and damage health . Trump said other countries must take measures to cut their emissions.
Bush had a pampered upbringing and attended the prestigious Phillips Academy in Andover, but delayed his acceptance to Yale in order to enlist in the US Navy on his 18th birthday and head off to war.
He was a World War II aviator and Texan oil tycoon before entering politics in 1964 as a Republican.
His son, George W. Bush, served two terms as president from 2001 through 2009.
In late 1989, Bush sent U.S. troops to Panama to oust strongman Manuel Noriega.
The campaign was over within weeks - one of the most tactically successful military operations in United States history.
Another son, Jeb - a former Florida governor - made an unsuccessful bid for the Republican nomination in 2016.
Four years later, however, Bush lost the presidency to Arkansas Gov. Bill Clinton, although the two later became friends, occasionally dispatched by subsequent USA presidents to oversee assistance efforts after natural disasters.