The author was a legend in the science-fiction genre for works such as Fahrenheit 451 and The Martian Chronicles.
He passed away last night, his daughter Alexandra told the Associated Press today.
Sci-fi blog iO9 spoke to Bradbury's grandson, Danny Karapetian, who said he was looking forward to hearing others share their memories of his grandfather.
"He influenced so many artists, writers, teachers, scientists, and it's always really touching and comforting to hear their stories," Karapetian told the site.
"His legacy lives on in his monumental body of books, film, television and theater, but more importantly, in the minds and hearts of anyone who read him, because to read him was to know him. He was the biggest kid I know."