Where did the dog breed "Chihuahua" originate?

The story behind the answer

Mexico is correct because the Chihuahua is named after the Mexican state of Chihuahua, where the modern breed was first noted in the 19th century. Genetic and historical evidence links them to the pre-Columbian Techichi, a small companion dog kept by Toltec and later Aztec civilizations.

Chihuahuas are among the smallest dog breeds, with prominent ears and big personalities. Their small size may have been favored in warm climates and for companionship rather than work. Memory tip: Chihuahua = Chihuahua State in Mexico—same name, same origin. Think “tiny dog, big Mexican state name” to lock it in.