Infinitum was a science fiction and fantasy zine edited by William H. Doyle of Spring, Texas, U.S.A.
Two issues were produced: #1, released Summer/Fall 1985, and #2 in 1986.
The first issue contained fiction and nonfiction by F.M. Busby (Cry of the Nameless), John Michael Buss, William H. Doyle, Colleen Drippe, Marshall Epperson, Janet Fox (Scavenger's Newsletter), Edward Lodi, Darrell Schweitzer, Deloris Q. Twaddle, Bobby G. Warner, and Wayne Rile Williams, and poetry by Larry Baukin and Scott E. Green. Cover art was by Jeff Gaither. Interior illustrations came from Lari Davidson, William H. Doyle, Steven Fox, Dave Garcia, Jim Garrison, David Heath Jr., John Howard, Allen Koszowski, William Rotsler, and Reza Zamani.