No. Przewalski’s horse is not extinct, although it did die out in the wild. The last wild sightings were in the Gobi Desert of Mongolia in the 1960s, and the species survived only in zoos, where today’s horses descend from just 14 founders caught between 1910 and 1960.
Captive breeding under an international studbook, started in 1959, made it possible to return the horses to the steppe. They now live in reintroduction sites in Mongolia, China, and Kazakhstan, but the species is still endangered and depends on ongoing conservation work. It is considered the only truly wild horse left; the “wild” mustangs of North America and brumbies of Australia are feral descendants of domestic horses.
Source: Smithsonian’s National Zoo and Conservation Biology Institute: Przewalski’s horse
Image: Przewalski’s horse at Altanbulag, Töv, Mongolia, CC0, via Wikimedia Commons.