The Nekromantikon was an amateur press periodical released by Manly Banister in Kansas City, Missouri, U.S.A..
Subtitled "The Amateur Magazine of Weird and Fantasy", it was a literary fanzine focusing on fiction in the weird, fantasy and science fiction genres. Five issues were released in the 1950s. It was a mimeographed publication and the cover and illustrations for the first issue were made with linoleum cuts, carved and printed by the editor. All the issues have colour covers, issues two through five using photo-engravings.
The first issue was 52 pages, released in an edition of 250. The first four issues appeared in 1950 in Spring, Summer, Fall and Winter editions; the last issue appeared in 1951.
Contributors included Steve Benedict, C. O. Betancourt, Edwin Brooks, Alice L. Bullock, David R. Bunch, Isabelle E. Dinwiddle, Dorothy M. Faulkner, Hyacinthe Hill, Marjorie Houston, David William Hunter, Clive Jackson, Terry Jeeves, Lilith Lorraine, Vernon McCain, Orma McCormick, Genevieve K. Stephens, Charlotte Todd, E.C. Tubb, Cedric Walker, Wilson "Bob" Tucker, James Warren, and many others.
The Nekromantikon also contains the story "Why Abdul Alharred Went Mad", by D.R. Smith, which is considered an essential work in the creation of the Cthulhu Mythos.