Novels[]
- 1987 – Eddy Deco's Last Caper: An Illustrated Mystery
- 1988 – Everybody's Favorite Duck
Anthologies[]
- 1976 – Gahan Wilson's Favorite Tales of Horror
- 1977 – First World Fantasy Awards
- 1996 – Gahan Wilson's The Ultimate Haunted House
Collections[]
- 1965 – Graveside Manner
- 1971 – I Paint What I See
- 1973 – Playboy's Gahan Wilson
- 1975 – The Weird World of Gahan Wilson
- 1975 – Gahan Wilson's Cracked Cosmos
- 1978 – " ... and then we'll get him!"
- 1982 – Is Nothing Sacred?
- 1990 – Monster Baseball Trading Card Set
- 1990 – The Raven and Other Poems with Edgar Allan Poe
- 1994 – Gahan Wilson's Still Weird
- 1996 – Even Weirder
- 1998 – The Cleft and Other Odd Tales
- 2016 – Gahan Wilson's Out There
- 2019 – A Little Purple Book of Phantasies
Novelettes[]
Short Stories[]
- 1962 – Appetizer
- 1962 – Phyllis
- 1962 – The Books
- 1964 – Beware of the Dog
- 1964 – The Thing from Outer Space and the Prairie Dogs
- 1964 – The Scientist and the Monster
- 1966 – The Manuscript of Dr. Arness
- 1967 – The Knight-Errant, the Dragon, and the Maiden
- 1967 – The Sea Was Wet as Could Be
- 1967 – The Sea Monster and the Mayor of New York City
- 1967 – The Power of the Mandarin
- 1968 – Harry's Golden Years
- 1970 – M-1
- 1971 – The Science Fiction Horror Movie Pocket Computer
- 1972 – *
- 1972 – Click
- 1973 – Yesterday's Witch
- 1973 – The Zombie Butler
- 1975 – The Time Machine
- 1976 – End Game
- 1978 – Dracula Country: A Tour of Transylvania
- 1980 – Traps
- 1984 – A Gift of the Gods
- 1984 – The Substitute
- 1989 – Leavings
- 1990 – "Bowels" Jones: Kansas City Cannibals
- 1990 – "Eyes" Smith: Kansas City Cannibals
- 1990 – Chris Lee: Los Angeles Suckers
- 1990 – Dick Pickman: New Orleans Ghouls
- 1990 – Eddy Gein: Milwaukee Serials
- 1990 – Jack Ripper: Milwaukee Serials
- 1990 – Rip Thurber: New Orleans Ghouls
- 1990 – Spikes Lugosi: Los Angeles Suckers
- 1990 – Urp Barf: Allegheny Aliens
- 1990 – Z'Narg Kqstl: Allegheny Aliens
- 1990 – Mister Ice Cold
- 1991 – Them Bleaks
- 1991 – Sea Gulls
- 1992 – Come One, Come All
- 1993 – The Frog Prince
- 1993 – The Marble Boy
- 1993 – It Twineth Round Thee in Thy Joy
- 1995 – Hansel and Grettel
- 1995 – The Casino Mirago
- 1996 – Best Friends
- 1998 – Campfire Story
- 1998 – The Cleft
- 2000 – Final Departure
- 2003 – Tuning's Spasms
- 2003 – The Big Green Grin
- 2003 – The Dead Ghost
- 2005 – The Outermost Borough
Poems[]