Xenium was a science fiction fanzine by Mike Glicksohn.
Published in Toronto, Ontario, Canada, Xenium was begun as an apazine for APA-45 by Mike Glicksohn and Susan Wood; as of issue four, which was constituted as "Volume 2", it was edited by Mike Glicksohn alone, and was distributed by Fantasy Amateur Press Association.
Contributors of art work included Alicia Austin, Barry Base, Randy Bathurst, Harry Bell, John Berry, Sheryl Birkhard, Grant Canfield, Derek Carter, Connie Reich Faddis (Interphase), Mike Gilbert, C. Lee Healy, John Ingham, Tim Kirk, Vic Kostriken, Marty Larson, Barry Kent MacKay, Jim McLeod, Paul Neary, Bill Rotsler, Jim Shull, Dan Steffan, Angus Taylor, Bjo Trimble (Melange), and others.
Covers were by C. Lee Healy (#1, #3), Tim Kirk (#2), Jim Shull (#4), Derek Carter (#8).
Contributions of comic strips came from Alicia Austin, and Steve Stiles.
Letters came from Robert Bloch, Eli Cohen (Kratophany), Don D'Ammassa, David Emerson (Rune), Jackie Franke (Resolution), Jerry Kaufman (The Spanish Inquisition), Sam Long, Mike O'Brien, Peter Roberts, and others.
Mike Glicksohn and Susan Wood also published Energumen.