Zanabazar is a genus of large troodontid dinosaurs from the Late Cretaceous of Mongolia.

The holotype was discovered in 1964 from the Bügiin Tsav locality of the Nemegt Formation and initially described by Rinchen Barsbold as a new species of Saurornithoides (S. junior) in 1974.

[1] Zanabazar were large troodontids reaching 2.3 m (7.5 ft) in length and weighing 25 kg (55 lb).

[4] The preserved vertebrae in IGM 100/1 are completely fused, indicating that this individual was an adult at the time of death.

[1] While originally included in Saurornithoides, within the family Saurornithoididae,[2] Zanabazar is now thought to be a derived member of Troodontidae.