Trnovica may refer to several placenames:
- In Bosnia and Herzegovina
- Trnovica, Bileća, village in the municipality of Bileća
- Trnovica, Kalinovik, village in the municipality of Kalinovik
- Trnovica (Zvornik), village in the municipality of Zvornik
- In Croatia
- Trnovica, Dubrovnik-Neretva County, village in the municipality of Dubrovačko Primorje
- Trnovica, Primorje-Gorski Kotar County, village in the municipality of Jelenje
- In Kosovo
- Tërrnavicë (Serbian: Trnovica or Trnavica), village near Podujevo
- In Montenegro
- Trnovica, Montenegro, village in the municipality of Kolašin
- In Slovenia
- Trnovica, Ivančna Gorica, a village in the municipality of Ivančna Gorica