If you’re looking for a dog breed that provides comfort and security, with a larger-than-life personality, you might want a big dog. Large dogs can be appealing and useful, providing protection and even more to love. However, large dog breeds have some special considerations and things to know before getting one.
Here are the largest dog breeds and the best ones for companionship and loyalty.
The table below shows the largest dog breeds, their most winning feature, and what role they’re best suited for, according to the American Kennel Club (AKC).
Rank  | Breed | Most Winning Feature | Best for |
|---|---|---|---|
| 1 | Mastiff (aka English mastiff) | Protective | Loyal guard dogs |
| 2 | Saint Bernard | Playful | Owners with children |
| 3 | Great Dane | Dependable | Close bonds with owner |
| 4 | Leonberger | Friendly | Affectionate |
| 5 | Neapolitan mastiff | Vigilant | Security |
| 6 | Anatolian shepherd | Strong | Farmers who need a livestock or flock guardian |
| 7 | Newfoundland | Sweet temperament | Companionship |
| 8 | Tibetan mastiff | Watchful | Calm temperament |
| 9 | Black Russian terrier | Intelligent | Service or therapy dog |
| 10 | Bullmastiff | Brave | Protection |
When looking at the largest dog breeds, height and weight can vary by gender. Generally, big dogs can range from 23 to 32 inches in height and 70 to 230 pounds. Many giant dogs are part of the working group and have a striking appearance. These dogs were bred to work and help with pulling sleds, protecting flocks, providing security, and more.[?]
Breeders typically consider height at the shoulder when the dog is on all fours, standing height on hind legs, weight, musculature, and the dog group. These factors combined create the largest dog breeds.
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If you’re looking at giant dog breeds, height is a consideration. Here are the top three tallest dog breeds, including their height at shoulder, weight, and life expectancy, according to the AKC.
Breed | Height (at Shoulder) | Weight | Life Expectancy |
|---|---|---|---|
| Irish wolfhound | 30 inches or more (female) 32 inches or more (male) | 105 lbs (female) 120 lbs (male) | 6–8 years |
| Scottish deerhound | 28 inches or more (female) 30–32 inches (male) | 75–95 lbs (female) 85–110 lbs (male) | 8–11 years |
| Great Dane | 28–30 inches (female) 30–32 inches (male) | 110–140 lbs (female) 140–175 lbs (male) | 7–10 years |
Giant dogs have a commanding stature and come in many different sizes. Here are the top three heaviest breeds by weight, including height at shoulder and life expectancy, according to the AKC.
Breed | Weight | Height (at Shoulder) | Life Expectancy |
|---|---|---|---|
| Mastiff | 120–170 lbs (female) 160–230 lbs (male) | 27.5 inches or more (female) 30 inches or more (male) | 6–10 years |
| Saint Bernard | 120–140 lbs (female) 140–180 lbs (male) | 26–28 inches (female) 28–30 inches (male) | 8–10 years |
| Great Dane | 110–140 lbs (female) 140–175 lbs (male) | 28–30 inches (female) 30–32 inches (male) | 7–10 years |
Large dogs may have been bred for different purposes. If you’re looking for a big dog with a bright personality, here are some that make great companions:
Saint Bernard: Patient, playful, and good with children, Saint Bernards have a personality that’s easy to love.
Great Dane: If you want a friendly, reliable, and commanding dog, a Great Dane may be a good fit. Great Danes are gentle giants and can provide security and companionship.
Leonberger: Known as a kind, gentle, peaceful dog, Leonbergers are the definition of a furry friend.
Newfoundland: This “nanny dog” is a devoted, kind breed that’s good with kids, according to the AKC.
Bernese mountain dog: These affectionate and loving dogs are good with young children and often form deep emotional attachment.
Large dogs are unique in that many of them were bred for a specific purpose, such as watching the farm, providing protection, pulling sleds, and more. Some of the biggest dog breeds can be gentle giants and provide dog lovers security and comfort.
Before adding a large dog to your family, consider the pros and cons.[?]
Good guard dogs: Many of the largest dogs were bred to provide protection and security and can help ward off potential attackers or invaders.
Great companions: Large breed dogs can also be loyal and loving companions.
Unique skills: Some large dog breeds were bred to rescue people or to hunt, making them useful working dogs that can help you accomplish unique tasks.
More expensive: You’ll need more food, more space, larger toys, and beds. Vet appointments and pet insurance will likely cost more, too.
Require training: Since many large dogs were bred for a specific purpose, if you’re getting one as a pet, you’ll need to train it so it’s not a danger to others.
Slower development: Physically and mentally, it can take a longer time for bigger dogs to mature fully.
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Big dogs can come with big costs. If you’re considering getting one of the largest dog breeds, review your budget and total costs. Here are some common expenses associated with larger dogs.
If you’re considering one of the largest dog breeds, you may have some questions. Here’s some additional information about large dogs.
Various types of large dogs can differ by weight. An extra-large, or XL, dog breed is typically one that’s 100 pounds or more. Dogs like cane corsos, Great Pyrenees, Irish wolfhounds, and Great Danes are all considered extra-large breeds.
The heaviest dog breed is the mastiff. Female mastiffs can weigh up to 170 pounds, while male mastiffs can weigh up to 230 pounds. At those weights, Mastiffs can be heavier than some humans.
The tallest dog breed is the Irish wolfhound. Female Irish wolfhounds can be 30 inches at the shoulder, and males can be 32 inches at the shoulder. The Irish wolfhound is officially the tallest dog breed, according to the AKC.
Irish wolfhounds are part of the largest and tallest dog breeds, but they’re also a lazy breed.
Two large dog breeds good for families with children include Saint Bernards and Newfoundlands. Saint Bernards are protective and fond of children, while Newfoundlands are referred to as a nanny dog, according to the AKC.
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