Netherworld may refer to:
- Underworld, a region thought to be beneath the surface of the world in many religions and mythologies
In film and television:
- Netherworld (film), a 1992 horror film
- Nether World (film), a 1997 film starring Mark Sheppard
- "Netherworld" (The Dead Zone), an episode of The Dead Zone
- Netherworld, the fictional source of all villains in Power Rangers Samurai
In literature:
- Netherworld (DC Comics), a fictional autonomous neighborhood of the city of Chicago
- Netherworld (Runelords), an alternate plane of existence in The Runelords novel series by David Farland
- The Nether World, an 1889 novel by George Gissing
- Netherworld, in the Marvel Comics universe, a city ruled by Kala
In other uses:
- Netherworld (video game), a 1988 8-bit computer game
- Netherworld Haunted House, a walk-through dark attraction established in 1997, in Atlanta, Georgia
- Netherworld, a fictional location in the video game Perfect Cherry Blossom