K
- K'ril Tsutsaroth (RuneScape online role-playing game)
- Kal'Ger the Warmonger (RuneScape online role-playing game)
- Kaa Jinn (Strange)
- Kappa Tengu (Teenage Mutant Ninja Turtles)
- Kayako Saeki (Ju-On film series)
- DCI Jim Keats (Ashes to Ashes TV series)
- Khorne (Warhammer Fantasy)
- Killabilly (Lollipop Chainsaw)
- Kil'jaeden (Warcraft series)
- Kneesocks (Panty & Stocking with Garterbelt)
- Koakuma from Touhou Project
- Korrok (David Wong, John Dies at the End novel)
- Kronos (In Nomine role-playing game)
- Freddy Krueger, the Dream Demon (A Nightmare on Elm Street film series)
Read more about this topic: List Of Fictional Demons