Czarnia may refer to:
- Czarnia (comics), 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)
Czarnia may refer to: