Cimmeria may refer to:
- Cimmeria, an ancient name of the Crimea, a peninsula in the North part of Black Sea, or the Eastern part thereof
- Cimmerians, an ancient people who lived in the south of modern-day Ukraine in the 8th and 7th century BC, usually associated with the ancient Cimmeria or Crimea (mentioned above)
- Cimmeria (continent), an ancient microcontinent separating the ancient Paleo-Tethys and Neo-Tethys oceans
- Cimmeria (Conan), a fictional country in the Conan the Barbarian stories created by Robert E. Howard
- First mentioned in his poem Cimmeria
- Cimmeria (Calvino), a fictional country in If on a winter's night a traveler by Italo Calvino
- Cimmeria (Stargate), a fictional planet in the Stargate setting