Carr discovered science fiction fandom in 1949,[2] where he became an enthusiastic publisher of fanzines, which later helped open his way into the commercial publishing world. (He was one of the two fans responsible for the hoax fan 'Carl Brandon' after whom the Carl Brandon Society takes its name.) Despite a long career as a science fiction professional, he continued to participate as a fan until his death. He was nominated five times for Hugos for Best Fanzine (1959–1961, 1967–1968), winning in 1959, was nominated three times for Best Fan Writer (1971–1973), winning in 1973, and was Fan Guest of Honor at ConFederation in 1986.
After conflicts with Ace head Donald A. Wollheim, he worked as a freelancer. He edited an original story anthology series called Universe, and a popular series of The Best Science Fiction of the Year anthologies that ran from 1972 until his death in 1987. He also edited numerous one-off anthologies over the same time span. He was nominated for the Hugo for Best Editor thirteen times (1973–1975, 1977–1979, 1981–1987), winning twice (1985 and 1987). His win in 1985 was the first time a freelance editor had won.
Terry Carr commissioned a first novel from William Gibson for the second series of Ace Science Fiction Specials, shortly after the Denver WorldCon, 1981. The purpose of the series was to give attention to first-time novelists. Gibson's fellow Ace Specials first-timers were Kim Stanley Robinson, Michael Swanwick, Lucius Shepard, Carter Scholz, and Howard Waldrop.[3] William Gibson mentions Carr in the introduction to the 20th Anniversary Edition of the book: "Having been talked into signing a contract (by the late Terry Carr, without whom there would certainly be no Neuromancer) . . ."[4]
Carr married a fellow science fiction fan, Miriam Dyches, in 1959.[1] They were divorced in 1961. Later that year, Carr married Carol Stuart. He remained married to her until his death. Under her married name of Carol Carr, his widow has also sold science fiction: "You Think You've Got Troubles" (1969), "Inside" (1970), "Some Are Born Cats" (1973, with Terry Carr), "Wally a Deux" (1973), and "Tooth Fairy" (1984).