Helios was a science fiction fanzine by Sam Moskowitz.
The first issue of Helios was published in the 1937 in Newark, New Jersey, U.S.A., edited by Sam Moskowitz and Alex Osheroff. It was a hectographed, stapled publication. Six issues were released, with issues two to six edited solely by Moskowitz. The last issue appeared in May 1938.
Contributors included Robert Sanders Shew, Willis C. Conover, Morris S. Dollens, Litterio B. Farcasi (The Golden Atom), John Russell Fearn, Chester Fein, Nils Helmer Frome (Supramundane Stories), David H. Keller, Fred Lawrence, John Bee Myshell, Alex Osheroff, J. Michael Rosenblum, Clark Ashton Smith, Louis C. Smith, Corwin Stickney, James V. Taurasi, Robert G. Thompson, Raymond Van Houten (Tesseract), Richard Wilson, Jr. and Donald Wollheim.