there are 500 dog breeds in the world. The American Kennel Club currently recognizes 36 main breeds of dogs. There are many variations of these dog breeds, but they all share similar traits. For a complete list, see the related link. There are more than 300 breeds of dog, and it is increasing as people continue to selectively breed dogs for different purposes and appearances. I've read many articles but i think there is 400-600. Breeders have been creating many by mating to different breeds of dogs.