Batbayar is a Mongolian patronym. Notable people with the name include:
Bat-Erdeniin Batbayar, known mononymously as Baabar (born 1954), Mongolian politician Batjargalyn Batbayar (born 1953), Mongolian politician Khash-Erdene Batbayar (born 1997), Mongolian footballer Kyokushūzan Noboru (born 1973), Mongolian politician and former sumo wrestler Nyamjavyn Batbayar (born 1960), Mongolian politician Tsogtyn Batbayar, Mongolian politician Vanduin Batbayar (born 1950), Mongolian boxer