Graham passed away at the age of 99 in his home in Montreat, North Carolina, spokesman Jeremy Blume said.
The preacher with the booming voice evangelized to nearly 215 million people over six decades and prayed with US presidents from Harry Truman to Barack Obama.
Several presidents, including Lyndon Johnson, George W. Bush and Bill Clinton, relied closely on his spiritual counsel.
Graham is flanked by US President Richard Nixon, left, and Vice
The great evangelist persuaded more than 3 million people to commit their lives to Christianity and his preaching was heard in 185 of the world's 195 countries, according to the Billy Graham Evangelistic Association.
"He was probably the dominant religious leader of his era; no more than one or two popes, perhaps one or two other people, could come close to what he achieved," said William Martin, a former historian at Rice University and the author of "A Prophet with Honor: The Billy Graham Story."
People across the world mourned Graham's death.
President Donald Trump said in a tweet that "the GREAT Billy Graham is dead. There was nobody like him! He will be missed by Christians and all religions. A very special man."
Vice President Mike Pence said in a statement that "Karen and I were saddened to learn of the passing of one of the greatest Americans of the 20th century, Reverend Billy Graham."
BY DORCAS ISEOLUWA OLAWALE
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