Gregory Dale Bear (August 20, 1951 – November 19, 2022) was an American science fiction writer. His work covered themes of galactic conflict (Forge of God books), parallel universes (The Way series), consciousness and cultural practices (Queen of Angels), and accelerated evolution (Blood Music, Darwin's Radio, and Darwin's Children). His last work was the 2021 novel The Unfinished Land. Greg Bear wrote over 50 books in total.

He was one of the five co-founders of San Diego Comic-Con. Greg Bear published more than thirty novels and five story collections, earning him five Nebulas, two Hugos, two Endeavours, and the Galaxy Award (China). He was married to Astrid Anderson Bear and was the father of two young writers, Chloe and Alexandra.