Sunand Tryambak Joshi (b. 22 June 1958 in Pune, India) — known as S. T. Joshi — is an award-winning Indian American literary critic, novelist, and a leading figure in the study of Howard Phillips Lovecraft and other authors of weird and fantastic fiction. Besides having written what critics such as Harold Bloom and Joyce Carol Oates consider to be the definitive biography of Lovecraft, I Am Providence: The Life and Times of H.P. Lovecraft (Hippocampus Press, 2 vols, 2010 [originally published in one volume as H. P. Lovecraft: A Life, 1996]), Joshi has prepared (with David E. Schultz) several annotated editions of works by Ambrose Bierce.

He has been general editor of the Horror Classics series for Dover Publications. Most recently he has turned his attention to collecting and editing the works of H. L. Mencken. He currently resides in Seattle, Washington.