Helios was a science fiction fanzine by Sam Moskowitz.
Helios was first published in the 1930s in Newark, New Jersey, U.S.A. It was a hectographed, stapled publication.
Contributors included Robert Sanders Shew, Willis C. Conover, Morris S. Dollens, L.B. Farcase, 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.