The Kustanair (Kazakh: Qostanaı) is a breed of horse developed in Kazakhstan in the former U.S.S.R. in the late 19th and early 20th centuries.

The breed was created by infusing native Kazakh steppe horses with Thoroughbred, Russian Don, Stralet, and Astrakhan (improved Kalmyk) blood.

At the beginning the crossbreeding seemed unsuccessful, but with better management of brood mares and the addition of more Thoroughbred blood, the breed was created in the 1920s.

[1] The Kustanair generally stands 15 to 15.1 hands high and the coat can be bay, brown, black, chestnut, gray or roan.

[citation needed] Deliberate differences in management styles at the various state studs produced two subtypes with the Kustanair breed.