The Arabian is the most popular horse breed, followed closely by the Quarter Horse.
the most popular Breed is The Quarter Horse becasue if its work habbits [ScooterHorse on HorseIsle GO CARMELLO!!!]
The Quarter horse
In America, the most popular breed is the American Quarter Horse.
Arabian Horse unicorns are probably the most popular.
I would say, based on experiece, that the most popular breed of horse is the Arabian, though there is most likely a lot of debate on the subject.
It depends on where you are asking about, and for what purpose. Out of stock-breed horses, the most popular is the Quarter Horse. Arabians are popular for a lot of different reasons. Racing = Thoroughbreds, and so on.
The most popular is Arabian. And then I believe it is paint horse.
The most popular breed in america is the American Quarter horse, followed my The American Paint horse, and other breeds such as the Appaloosa, Morgon, Arabian, and thorughbred.