|Editor-in-chief||Vanessa Rose Phin|
|Former editors||Jane Crowley|
Susan Marie Groppi
Mary Anne Mohanraj
|Founder||Mary Anne Mohanraj|
|First issue||September 2000|
It was launched in September 2000, and publishes new material (fiction, articles, reviews, poetry, and/or art) 51 weeks of the year, with an emphasis on "new, underrepresented, and global voices." The magazine was founded by writer and editor Mary Anne Mohanraj. It has a staff of approximately sixty volunteers, and is unusual among professional speculative fiction magazines in being funded entirely by donations, holding annual fund drives.
Susan Marie Groppi won the World Fantasy Special Award: Non-Professional in 2010 for her work as Editor-in-Chief on Strange Horizons. The magazine itself was a finalist for the Best Website Hugo Award in 2002 and 2005, and for the Hugo Award for Best Semiprozine every year from 2013 through 2021.
The short story "The House Beyond Your Sky" by Benjamin Rosenbaum, published in 2006 in the magazine, was nominated for a 2007 Hugo Award for Best Short Story. "Selkie Stories Are For Losers" by Sofia Samatar was nominated for a Hugo Award for Best Short Story in 2014. Other stories in Strange Horizons have been nominated for the Nebula and other awards. Three stories published in Strange Horizons have won the Theodore Sturgeon Award.