Carinthia may refer to:
- Carinthia (state), a state of the Republic of Austria
- Slovenian Carinthia, a traditional region of Slovenia
- Koroška statistical region, the statistical region of Slovenia
- March of Carinthia, in the Holy Roman Empire
- Duchy of Carinthia, in the Holy Roman Empire, the Austrian Empire and the Austro-Hungarian Empire
- Carantania, a medieval Slavic principality
- RMS Carinthia, the name of more than one Cunard Line passenger ship