Trojka or Trójka literally means the digit or number three in some Slavic languages (e.g. Serbian, Bosnian, Polish, Czech, Slovak).
The word may also refer to:
- Trójka, Greater Poland Voivodeship, a village in Poland
- Utva Trojka, a Yugoslav light aircraft
- Trojka (TV channel), a defunct Slovak television channel owned and operated by Radio and Television of Slovakia until 2022.
- Trójka or Radiowa Trójka, Polish Radio Program 3