The Best Science Fiction of the Year #4 is an anthology of science fiction short stories edited by Terry Carr, the fourth volume in a series of sixteen.

It was first published in paperback by Ballantine Books in July 1975, and reissued in October 1976.

The first British edition was published in hardcover by Gollancz in September 1975.

The book collects ten novellas, novelettes and short stories by various science fiction authors, with an introduction, notes and concluding essays by Carr and Charles N. Brown.

"We Purchased People" placed eleventh in the 1975 Locus Poll Award for Best Short Story.