Bayan-Ovoo (Mongolian: Баян Овоо, Mongolian: rich shrine) may refer to:
Mongolia
- Bayan-Ovoo, Bayankhongor, a sum (district) in Bayankhongor Province
- Bayan-Ovoo, Khentii, a sum (district) in Khentii Province
- Bayan-Ovoo, Ömnögovi, a sum (district) in Ömnögovi Province
China
- Bayan Obo, Darhan Muminggan [zh], a sum in Darhan Muminggan United Banner, Baotou, Inner Mongolia
- Bayan Obo, Dorbod [zh], a sum in Dorbod Banner, Ulanqab, Inner Mongolia
- Bayan Obo Mining District, a district in Baotou, Inner Mongolia
- Bayan Obo mine, a deposit in Baotou, Inner Mongolia
- Bayan Ovoo, Hoboksar [zh] , a Township in Hoboksar, Tacheng, Xinjiang
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