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- Laharl (Disgaea)
- Lamia (Drag Me to Hell)
- Leprechaun (Leprechaun)
- Leviathan (Umineko no Naku Koro Ni)
- Libicocco (Dante's Inferno)
- Lewis Legend, the Zombie of Rock (Lollipop Chainsaw)
- Ligur (Neil Gaiman and Terry Pratchett, Good Omens)
- Lilith (Supernatural TV series)
- Lilith (Lineage II)
- Lilith (Diablo series)
- Little Nicky (Little Nicky)
- Loc-Nar (Heavy Metal)
- Longhorn Golkonda (Lineage II)
- The Lord Of Bones (Darksiders II)
- Lord of Darkness (Legend)
- Lord English (Homestuck)
- Lord Loss (Darren Shan, The Demonata)
- Lorne (Angel)
- Loki (Marvel comics)
- Lucifer (Umineko no Naku Koro Ni)
- Lucifer (The Passion of The Christ)
- Lucifuge Rofocal (Jack Nightingale series)
Read more about this topic: List Of Fictional Demons