What Is the Largest Breed of Dog Known to Man?
Determining what the largest breed of dog known to man is depends on whether large is defined by height or by weight. Some breeds, such as the Irish Wolfhound, are lengthy; however, the heaviest of wolfhounds do not come close to the weight of the lightest of Saint Bernards. Furthermore, overlap exists between various large breeds of dogs. A number fall into the 150 pound range, and a number of others fall into the 30 inch range. In fact, the tallest dog on record is a Great Dane measuring in at 42.2 inches tall, and the heaviest dog is a 343 pound English Mastiff. However, neither breed is always the largest breed. Therefore, the short answer is that there is no one dog that is always larger than others in all circumstances.