| Demon Theory | |
| Author: | Stephen Graham Jones |
| Cover Artist: | Jacket design by Dorothy Carico Smith |
| Country: | United States |
| Language: | English |
| Publisher: | MacAdam/Cage |
| Release Date: | April 27, 2006 |
| Media Type: | Print (hardback & paperback) |
| Pages: | 439 pp (first edition, paperback) |
| Isbn: | 978-1-59692-216-7 |
| Isbn Note: | (first edition, paperback) |
| Oclc: | 62878706 |
| Preceded By: | Bleed Into Me |
| Followed By: | The Long Trial of Nolan Dugatti |
Demon Theory is a novel written by Native American author Stephen Graham Jones. Written like a screenplay, it was published in 2006.
The novel/screenplay explores a long list of normal and bizarre subject matters, including demons, angels, gargoyles, familial dysfunction, guilt, trust, and sanity.