Tanja is a female given name
Tanja may also refer to:
- Alternate name for Tangier, a Moroccan city
- Alternate transliteration for danja (단자; 團餈), a Korean rice cake
- Tanja Liedtke Foundation, German-based charity supporting modern and contemporary dance
- Tanja (TV series), a 39-piece German ARD Art Series by Berengar Pfahl
- Tanja sail, also known as the tilted square sail, used by native Austronesian ships in maritime Southeast Asia