Carinthia (Kärnten in German, Koroška in Slovenian) can refer to:

• Carinthia - a federal state of Austria
• Carinthia - an informal province in Slovenia
• Duchy of Carinthia - of the Holy Roman Empire that later became a crownland of Austria-Hungary
• Karantania - the first Slovenian state
• Carinthia (ship) - RMS Carinthia one of four ocean liners built for the Cunard Line in the 1950s