Science Fiction Adventures was an American digest-size science fiction magazine, published from 1952 to 1954 by Science Fiction Publications. It was edited by Lester del Rey, under the pseudonym "Philip St. John", and was targeted at a younger audience than its companion magazine, Space Science Fiction. Contributors included Algis Budrys, Raymond Z. Gallun, Robert Sheckley, and del Rey himself, who published his novel Police Your Planet under the pseudonym "Erik van Lhin". Damon Knight contributed a book review column beginning with the fifth issue. Cyril M. Kornbluth's novel The Syndic was serialized in 1954. Artwork was provided by H.R. van Dongen, Kelly Freas, and Paul Orban, among others.
Lester del Rey left at the end of 1953, and his place was taken by Harry Harrison, but the magazine lasted for only three more issues.