Biggest Dog Breeds 

There’s something truly fascinating about the biggest dog breeds. They command attention wherever they go, not just because of their size, but because of the way they carry themselves. These dogs can weigh more than an average human.

I’ve always found it amusing that the largest breeds often think they’re lap dogs, trying to curl up on your sofa (or even your lap) as if they were toy breeds. Living with one of these massive companions can be equal parts challenging and rewarding. They require space, food, training, and care but in return, they offer unmatched loyalty and an unforgettable presence.

Biggest Dog Breeds Chart

When people think of the biggest dog breeds, it’s easy to picture towering Great Danes or massive Mastiffs that look more like small bears than pets. But size isn’t just about height or weight, it also comes with unique personalities, special care needs, and a whole lot of love.

While their size might seem intimidating at first, most of them are surprisingly gentle, affectionate, and calm indoors. Understanding what makes these breeds special helps future owners appreciate not just their impressive looks, but also the devotion and companionship they bring into a home.

Biggest Dog Breeds Chart

English Mastiff: The Ultimate Gentle Giant

When people think of the biggest dog breeds, the English Mastiff usually tops the list. Known for its massive frame and calm temperament, it holds the record for the heaviest dog ever recorded, one Mastiff named Zorba weighed an incredible 343 lbs.

Traits of English Mastiffs:

• Incredibly loyal and affectionate with family.
• Natural protectors, they don’t need training to guard.
• Despite their size, they’re usually couch potatoes indoors.

Great Dane: The Tallest of Them All

If the Mastiff is the heaviest, the Great Dane is the tallest. Some can easily stand over 7 feet tall when on their hind legs. Despite their imposing size, they’re often called “gentle giants” because of their affectionate, playful, and sometimes goofy personalities.

• Height: 28-34 inches.
• Weight: 110-200 lbs.
• Temperament: Friendly, loving, and surprisingly good with kids.

Great Danes need plenty of space, but they aren’t as high-energy as you might think. They’re more likely to nap after a short play session than demand hours of exercise.

Saint Bernard: The Legendary Rescuer

Made famous by Alpine rescue missions, Saint Bernards are iconic. Their history in saving stranded travelers in snowy mountains makes them not just giant companions, but also legends.

Quick Traits:

• Strong and muscular, with a thick coat for cold weather.
• Gentle, patient, and protective.
• Drooling is a part of daily life with them.

These dogs thrive in families, but due to their size, they can unintentionally knock over small children so supervision is always key.

Irish Wolfhound: Noble Hunter

The Irish Wolfhound may not be the heaviest, but it’s one of the tallest breeds. Bred originally to hunt wolves and large game, they have a noble presence and calm demeanor.

• Height: 30-34 inches.
• Weight: 105-180 lbs.
• Traits: Dignified, gentle, intelligent, but need space to stretch out.

Wolfhounds don’t live as long as smaller breeds (6-10 years), which is one of the few downsides of owning such a majestic dog.

Leonberger: The Family Lion

The Leonberger was bred as a companion for European royalty, and it certainly looks the part. With a lion-like mane and a calm, balanced temperament, it’s often described as the perfect family giant.

Leonberger Highlights:

• Great with children, they’re patient and affectionate.
• Protective without being aggressive.
• Require regular grooming because of their thick double coat.

For families that want both size and gentleness, Leonbergers check all the boxes.

Tibetan Mastiff: Fierce Guardian of the Himalayas

The Tibetan Mastiff is one of the most ancient and legendary biggest dog breeds. Known for its protective nature, this breed was originally used to guard monasteries and livestock in the Himalayas.

• Height: 24-30 inches.
• Weight: 90-160 lbs.
• Temperament: Independent, protective, loyal.

This is not a beginner’s dog, their strong guarding instincts and independence require experienced ownership.

Newfoundland: The Water Rescue Expert

While many big dogs guard, the Newfoundland saves lives in water. With webbed feet, incredible swimming ability, and natural rescue instincts, they’ve been known to pull drowning people to safety.

Traits:

• Gentle, sweet-tempered, and excellent with children.
• Great family dogs with a protective streak.
• Need lots of grooming due to their heavy coat.

Caring for the Biggest Dog Breeds

Owning one of these dogs isn’t just about marveling at their size. They have unique needs:

Feeding Needs:

• Large dogs eat a lot. Expect 6-10 cups of quality dog food per day.
• Joint supplements are often recommended.

Exercise:

• Moderate daily exercise (walks + play).
• Avoid over-exercising puppies to prevent joint issues.

Living Space:

• Big dogs need space, cramped apartments aren’t ideal.
• Secure, fenced yards are best.

Health Considerations:

• Many giant breeds are prone to hip dysplasia and bloat (gastric torsion).
• Lifespans are usually shorter (7-12 years).

Read this Birds dog breeds list

Rare Giant Dog Breeds You May Not Know

While most people recognize the Mastiff, Great Dane, or Saint Bernard, there are other giant dogs around the world that are just as impressive but not as commonly seen. These rare breeds bring unique histories and temperaments.

Health Concerns in the Biggest Dog Breeds

Large and giant dog breeds often face specific health challenges due to their size. Understanding these can help owners give their pets longer, healthier lives.

Also read: Dog Aggression Level Chart

FAQs 

Which dog is officially the biggest breed in the world?

The English Mastiff is generally considered the heaviest of all biggest dog breeds, with males sometimes exceeding 230 lbs or more. The record-holder Mastiff named Zorba weighed a jaw-dropping 343 lbs.

On the other hand, the Great Dane is recognized as the tallest dog breed in the world, with some reaching over 7 feet tall when standing on their hind legs. Both of these breeds take the crown in different categories, so the answer depends on whether you mean weight or height.

Do giant dog breeds live long lives?

Unfortunately, most giant dog breeds have a shorter lifespan compared to medium or small dogs. While small breeds can often live 12-16 years, giant breeds like the Irish Wolfhound or Great Dane usually live only 6-10 years on average.

This is mainly because their size puts more strain on their joints, heart, and organs. However, with proper diet, regular vet check-ups, and careful monitoring of common health issues (like bloat and hip dysplasia), some large dogs do live longer than expected.

Are the biggest dog breeds good with kids and families?

Most of the biggest dog breeds are known as gentle giants. Dogs like the Saint Bernard, Newfoundland, and Leonberger are incredibly patient, affectionate, and protective of children. They’re often nicknamed nanny dogs for their caring nature.

However, their sheer size can accidentally cause bumps or falls for very small children, so supervision is important. With proper training and socialization, they usually fit beautifully into family life and often become the most loving members of the household.

Do large dogs cost more to maintain?

Yes, owning one of the largest dog breeds comes with higher costs. Their food intake is massive, with some breeds needing up to 8-10 cups of high-quality food per day. Medical bills can also be higher, as surgeries, medications, and even X-rays cost more for large breeds due to their size.

Beyond that, crates, beds, collars, and toys all need to be extra-large (and more expensive). While they are wonderful companions, families should budget accordingly before bringing home one of these gentle giants.