The Fanscient was a science fiction fanzine published by Donald B. Day in Portland, Oregon, U.S.A.
The first issue of The Fanscient appeared in 1947. The first two issues were mimeographed and then the fanzine was letter pressed from then on, till the end of its run in 1951 with issue 14.
The Fanscient, along with Fantasy Commentator and Fantasy Advertiser are regarded by Harry Warner, Jr. as the fanzines that stand out in that era for their high quality fantasy and science fiction riting.
Each issue of Day's fanzine featured a particular author. Issue 1 featured A.E. van Vogt, Issue 5 focused on David H. Keller, and issue 8 on Robert Bloch, issue 10 on George O. Smith, Issue 11 on Theodore Sturgeon, issue 12 on Anthony Bloucher and issue 13-14 on L. Sprague de Camp. Many of these writers contributed their own biographies. Bibliographies were also included.
Contributors of writing included Forrest J. Ackerman (Voice of the Imagi-Nation), H.. Adams, James R. Adams, Eric Atlas, Philip Barker, Lambert Becker, D. Bruce Berry, Robert Bloch, Anthony Boucher, Ray Bradbury, Jim Bradley, Henry W. Cabot, Lin Carter, Thomas H. Carter, Stanton Coblentz (Different), Forrest C. Davis, Dorothy De Courcy, John De Courcy, Carl Dumbleton, Miles Eaton, E. Everett Evans, Thomas S. Gardner, John Grossman, Robert Heinlein, J.M. Higbee, Neil R. Jones, David H. Keller, Herman Stowell King, Bill Kroll, Henry Kuttner, Thyril L. Ladd, Murray Leinseter, Russ Manning, H.T. McAdams, Walter Pannell, Kingsborough Reedley, Darrell C. Richardson, Jim Skrzynski, Ken Slater, Edward E. Smith, J. Allen St. John, Norm Storer, Charles Stuart, Theodore Sturgeon, and Jack Williamson.