Bayan-Ovoo is a Mongolian place name that may refer to:
- Bayan-Ovoo, Bayankhongor, a sum (district) of Bayankhongor Province
- Bayan-Ovoo, Khentii, a sum (district) of Khentii Province
- Bayan-Ovoo, Ömnögovi, a sum (district) of Ömnögovi Province
- Bayan Obo, a settlement in Baotou, Inner Mongolia