"Microcosmic God" is a science fiction novelette by American writer Theodore Sturgeon. Originally published in April 1941 in the magazine Astounding Science Fiction, it was recognized as one of the best science fiction short stories published before the Nebula Awards by the Science Fiction Writers of America in 1970, and was named as one of the best science fiction stories in polls by Analog Science Fiction and Fact (the renamed Astounding) in 1971 and Locus in 1999. In 1976, it was also published as a comic book version (drawn by Adolfo Buylla) in issue 3 of Starstream: Adventures in Science Fiction, a comic anthology in four issues by Gold Key Comics.