Dementia 13 was a horror and weird fiction sine by Pam Creais.
Subtitled "An Illustrated Journal of the Arcane & Macabre", Dementia 13 began publishing in 1989 in Sidcup, Kent, in the UK. It featured fiction, articles, interviews, illustrations, and letters of comment. 14 issues were released, the last issue appearing in 1994.
Contributors of fiction included Neal Asher, Martin Blake, Daniel Buck, Derek Bull, Rick Cadger, Simon Clark, Philip J. Cockburn, John Duffield, Philip Holmes, P.F. Jeffery, Alexander Johnson, Kirk S. King, Joel Lane, D.F. Lewis, David Logan (Grotesque), Roderick MacDonald, Dan McGee, Anthony North, M.P. O'Connor, Mike Philbin (as Hertzan Chimera), Paul Pinn, Mark Samuels, William Smith, Bill Thompkins, S.P. Tollyfield, Ian Westbrook, Conrad Williams, and Paul Worts.
Articles were by Joel Lane, D.F. Lewis, Mike Philbin (as Hertzan Chimera), and Mark Samuels, among others.
Illustrations were by Cathy Buburuz (Champagne Horror), Tyra Buburuz, P.J. Creais, Kerry Earl, Dom Ganzelli, Dallas Goffin, Lawrence Kenny, Steve Lines, Alex Mathieson, Mike Philbin, Pete Queally, Rik, Michael Wdowik, and Roddy Williams.
Also featured were interviews with writers such as Ramsey Campbell, Simon Clark, and John Pritchard.
Letters came from Mark Samuels, among others.
In 1994, Dementia 13 won the British Fantasy Society's British Fantasy Award for Best Small Press Publication.