Castalia House publishes several authors who are well-known in the their fields, ranging from  science fiction and fantasy, to science, literary fiction, and military strategy. At present, Castalia House authors are as listed below. Links are to the author’s personal site.

• Mike Cernovich
• Cheah Kai Wai
• Nick Cole
• Martin van Creveld
• Vox Day
• David the Good
• Peter Grant
• C.R. Hallpike
• Jeffro Johnson
• B.V. Larson
• William S. Lind
• Jonathan Moeller
• Mojo Mori
• J. Mulrooney
• Jerry Pournelle
• Rolf Nelson
• Dr. Sarah Salviander
• Owen Stanley
• Jeff Sutton
• Ivan Throne
• David VanDyke
• Rod Walker
• John C. Wright
• Fenris Wulf
• Steve Keen
• Tara McCarthy