Arcturus was a science fiction fanzine published in Brooklyn, New York, U.S.A. by Harold W. Kirshenblit, as the official organ of the East New York Science Fiction League.
Arcturus ran for eight issues from December 1935 to April 1938. The first five issues were numbered 1.1 to 1.5, then Kirshenblit skipped two numbers and published 1.8 and 2.1. The final issue, 3.1, was edited by Frederik Pohl and was released as an incomplete issue.
Irving L. Kosow was the Associated Editor and R. Henry Drucke was the art editor.
Frederik Pohl was also the editor of The International Observer of Science and Science Fiction.