Czarnia is a fictional planet, the homeworld of DC Comics character Lobo before he wiped out the entire planet's race. The last Czarnian can be seen in series Lobo The Last Czarnian by Simon Bisley and Keith Giffen. Czarnia no longer exists in the DC universe.
Czarnia may refer to:
- Czarnia (fictional planet), a fictional home-planet of DC Comics character Lobo
- Czarnia, Gmina Czarnia in Masovian Voivodeship (east-central Poland)
- Czarnia, Gmina Kadzidło in Masovian Voivodeship (east-central Poland)