Batbayar is a Mongolian patronym. Notable people with the name include:
- Bat-Erdeniin Batbayar, known mononymously as Baabar, Mongolian politician
- Batjargalyn Batbayar, Mongolian politician
- Khash-Erdene Batbayar, Mongolian footballer
- Kyokushūzan Noboru, Mongolian politician and former sumo wrestler
- Nyamjavyn Batbayar, Mongolian politician
- Tsogtyn Batbayar, Mongolian politician
- Vanduin Batbayar, Mongolian boxer
