
18 Largest Dog Breeds in the World
Big dogs make wonderful family companions. If you’re looking for a lovable large dog, here are some of the largest dog breeds in the world:
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Average Size: Giant
Average Lifespan: 6-10 years
Kid/Pet Friendly: Sometimes
Registry: aca,akc
Activity Level: moderate
Shedding Level: moderate
Grooming Level: low
Trainability: moderate
Good For Novice Owners: moderate
Adaptability: moderate
Prey Drive: low
Watchdog: very alert
The English Mastiff, also referred to simply as a Mastiff, belongs to the Molosser breed type. It’s one of the most ancient dog breed types. The Molosser, its ancient ancestor, was a ferocious war dog that lived over 5,000 years ago. It likely originated in the mountains of Tibet and was also used as a guard dog and protector of herds and flocks.
The English Mastiff, Tibetan Mastiff, Saint Bernard, Dogue de Bordeaux, Rottweiler, and many other modern dog breeds and largest dog breeds share the Molosser ancestry. Throughout history, the Mastiff has been used as a guard dog, watchdog, and protector.
Although they still have a protective nature, the English Mastiff we know today is a gentle giant and is a far cry from their war dog ancestor. Although the first Mastiff club was formed in the United States in 1879, the American Kennel Club did not recognize the breed until 1885.
No English Mastiff puppies are available right now — check back soon!

Big dogs make wonderful family companions. If you’re looking for a lovable large dog, here are some of the largest dog breeds in the world:
Read more →
This giant dog breed is known to be a kid-friendly, gentle, and relaxed companion. Here are a few more facts about English Mastiffs:
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Dogs from TV, movies, & history can make us smile, laugh, cry, & wish for a dog of our own. These are the dog breeds of several famous dogs:
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Large dogs usually require a lot of space, but some do well in apartments or small homes. Here are the best large dog breeds for small homes:
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