When it comes to canine companions, some breeds stand out due to their massive size and formidable presence. These heavyweight dogs are not just impressive due to their physical dimensions, but they also bring a distinctive mix of strength, loyalty, and gentleness. Whether you’re drawn to their majestic stature or their commanding demeanor, these dogs are truly captivating. In this exploration of the 10 most heavyweight dog breeds, you’ll discover the unique characteristics and rich histories that make these gentle giants an enduring favorite among dog enthusiasts and pet owners alike. Prepare to be in awe of their sheer size and undeniable charm.
Ever dreamed of having a dog so big it could double as a small horse? Well, you’re in luck—these massive dogs aren’t just big; they’re legendary. Some of them weigh as much as a full-grown adult, and yes, they will absolutely try to sit on your lap anyway.
But don’t let their intimidating size fool you. These gentle giants are some of the most affectionate, loyal, and lovable dogs you’ll ever meet. However, they also come with giant responsibilities, from food bills that rival your rent to a never-ending supply of fur on your furniture.
The heaviest recorded dog weighed 34 pounds, proving that some of these breeds are basically small horses. But owning one isn’t just about their size—it’s about commitment, care, and a whole lot of drool.
So, if you think you’re ready for four-legged greatness, let’s dive into the world of the most heavyweight dog breeds on Earth!
10 Most Heavyweight Dog Breeds
1. English Mastiff
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Weight: 150–230 lbs
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Height: Up to 32 inches
First up, we have the English Mastiff, the heaviest dog breed in the world. If you’ve ever thought, “Hey, I’d love a dog that weighs more than most humans,” then congratulations—this one’s for you. They may look like Italian Mastiffs on steroids, but they’re gentle giants at heart.
These giant dogs were originally bred for guarding estates and even fighting in wars (yes, seriously). Now? They mostly protect your couch and your fridge from intruders (or you, if they’re feeling peckish). Despite their size, they are great family dogs, as long as you don’t mind accidental body slams.
According to AKC, caring for a large breed like this means carefully carefully watching their weight. Due to their size, their lifespans are shorter, and hip issues are common. Early training is a must because once they’re full-grown, convincing them to move is like trying to push a parked truck uphill.
If you have kids, strangers, or even small furniture, don’t worry—they’re incredibly affectionate, just a little… overwhelming. Be prepared for a lifetime supply of drool and love.
2. Saint Bernard
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Weight: 120–180 lbs
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Height: 26–30 inches
Remember that Bernese Mountain Dog you thought was big? Meet its even bigger, furrier cousin—the Saint Bernard. These rescue dogs were originally bred in the Swiss Alps to find and save lost travelers. Nowadays, they mostly save your heart with their affectionate and lovable personalities.
Despite their massive size, they are gentle giants that love kids and other dogs. However, they do come with two major drawbacks: shedding and drooling. If you don’t want to constantly wipe down your furniture (and your face), this may not be the breed for you.
Because they are large dogs, joint issues, heat sensitivity, and weight gain can be a problem. They need moderate exercise, but don’t expect them to be your agility champion—they prefer leisurely walks over intense runs.
PetMD claims that still, they still make great family pets, as long as you don’t mind the possibility of waking up in a puddle of drool.
Which Giant Dog Breed Would You Choose for a Family?
3. Newfoundland
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Weight: 100–150 lbs
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Height: 26–28 inches
If a big, fluffy mountain dog and a lifeguard had a baby, it would be the Newfoundland. These large breed dogs were originally bred for water rescue, and yes, they can outswim most humans. If you live near water, they will jump in—even if you don’t want them to.
They’re great companions—loving, protective, and intelligent. They love children and families, but be warned: their thick double coat means they shed constantly. If you don’t enjoy fur-covered furniture and clothes, you’re in for a rude awakening.
Britannica explains because they are big dogs, they need a careful diet and regular exercise to prevent obesity and joint problems. A strong-willed dog like this also requires early training, or you’ll have a 150-pound fluff ball dragging you down the street.
Still, if you want a loyal, affectionate, and water-loving dog, the Newfie is a fantastic choice—just don’t expect to keep your house dry.
4. Tibetan Mastiff
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Weight: 90–150 lbs
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Height: 24–30 inches
If a dog breed ever deserved the title “Livestock Guardian Supreme,” it’s the Tibetan Mastiff. With their lion-like mane and massive build, they look like a fluffy king ready to rule over your backyard.
These giant breeds were originally bred to protect livestock from predators, and they take their job very seriously. While they are protective and intelligent, they’re also strong-willed and independent—translation: they don’t care what you think.
PDSA believes that caring for one of these dogs means commitment. Their thick double coat requires serious grooming, and they need firm training from an early age. If you let them believe they’re in charge, you’ll never get them off your couch.
However, if you’re looking for a big dog breed that’s protective, loyal, and a little bit terrifying, the Tibetan Mastiff is your perfect four-legged security system.
5. Neapolitan Mastiff
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Weight: 110–150 lbs
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Height: 24–31 inches
Imagine a giant dog with a droopy face, wrinkled skin, and a serious attitude—congratulations, you’ve met the Neapolitan Mastiff. These big dogs look like they just walked off the set of a Tom Hanks mafia movie, but underneath all that excess skin, they are loyal, affectionate family pets.
Originally bred as guard dogs, they have a strong sense of protection and will watch over their humans like a hawk. However, they tend to be lazy giants, preferring lounging to running.
Purina warns that their huge size means joint problems and drooling galore. If you’re not a fan of cleaning up puddles of slobber, you might want to reconsider. These large dogs also need early training—otherwise, you’ll end up with a massive dog that does whatever it wants.
Despite their grumpy appearance, they are lovable, affectionate companions—just don’t expect them to fetch.
6. Great Dane
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Weight: 110–175 lbs
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Height: Up to 32 inches
Let’s be honest—the Great Dane is a horse with four legs and a wagging tail. Officially holding the title of the tallest dog breed, these elegant giants make you question whether you should walk them or just saddle up and ride into the sunset.
Despite their massive size, they’re affectionate, goofy, and surprisingly gentle. They’ll follow you around like a shadow, unaware that they’re too big to be a lapdog. But be warned—these tallest breed dogs have a strong sense of loyalty and will protect their families if needed.
Because they’re so tall, joint problems and heart issues can be a concern. They require early training and a balanced diet to keep their long legs and massive bodies in good shape.
If you want a dog that’s taller than most kids and thinks it’s the size of a Chihuahua, a Great Dane is the perfect gentle giant for you.
7. Irish Wolfhound
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Weight: 140–180 lbs
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Height: 30–32 inches
Once upon a time, the Irish Wolfhound was bred to hunt wolves and chase down deer. Now? They mostly chase after treats and belly rubs. These giant breeds look like something out of a medieval painting, towering over most dogs with their lean, muscular bodies.
Despite their hunting past, Irish Wolfhounds are gentle, affectionate, and great family dogs. They’re calm around kids and even get along with other dogs—as long as they’re properly socialized.
Like most large breed dogs, they’re prone to joint issues and need a lot of space. They’re also not the longest-lived breed, which is heartbreaking for owners. Still, they fill every moment with love.
If you want a tall, elegant, and affectionate dog that looks like it belongs in a fantasy novel, the Irish Wolfhound is your dream pet.
8. Great Pyrenees
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Weight: 85–160 lbs
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Height: 25–32 inches
Meet the Great Pyrenees, a majestic, fluffy mountain dog that was originally bred to guard livestock in the French Pyrenees mountains. If you’re looking for a protective, strong-willed, and intelligent dog, this one is your perfect match.
They are fiercely loyal and protective of their families but remain gentle and affectionate with children and other pets. They have a thick double coat, making them great companions in cold climates—but also walking snow machines when they start shedding.
Because they are strong-willed and independent, they require early training to keep their guarding instincts in check. Exercise is important, but don’t expect them to be overly energetic—they prefer to patrol their territory in majestic slow motion.
If you want a large dog breed that’s affectionate, protective, and ready to keep watch over your home, the Great Pyrenees is the ultimate livestock guardian (or, you know, couch guardian).
9. Bullmastiff
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Weight: 100–130 lbs
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Height: 24–27 inches
If a bodybuilder and a teddy bear had a dog, it would be the Bullmastiff. Originally bred to guard estates, these large breed dogs have a strong sense of protection but are also affectionate family pets.
Despite their muscular build, they are gentle giants—as long as you’re not an intruder. Their instinct is to pin down strangers rather than bite, making them effective yet controlled guard dogs.
VCA recommends that like most big dogs, they need early training and socialization to prevent them from becoming too strong-willed. They’re not super high-energy, but they still need regular walks and exercise to stay fit.
If you want a loving yet protective family dog that’s a muscular cuddle machine, the Bullmastiff is a great choice. Just be prepared for a lot of snoring and drool.
10. Dogue de Bordeaux
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Weight: 110–150 lbs
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Height: 23–27 inches
Last but not least, we have the Dogue de Bordeaux, also known as the French Mastiff. If this breed looks familiar, you might remember it from the Tom Hanks movie “Turner & Hooch”, where it played a drooling, loveable disaster.
Omlet mentions that these large dogs were originally bred to guard French estates, and they still have that protective nature. They’re loyal, affectionate, and form strong bonds with their families—but they also have a serious, no-nonsense expression that could scare off any intruder.
Because of their massive size and thick build, they need careful food monitoring to avoid obesity. They’re not the most active breed, so daily walks and early training are essential to keep them from turning into giant couch potatoes.
If you’re looking for a large breed dog that’s lovable, protective, and slightly grumpy-looking, the Dogue de Bordeaux is the perfect pet. Just don’t expect a drool-free home.
Fun Facts
The Guinness World Records has documented some truly colossal canines over the years. Here are five of the heaviest dogs ever recorded:
1. Zorba the English Mastiff: In 1989, Zorba weighed an astounding 343 pounds (155.6 kg) and measured over 8 feet (2.5 meters) from nose to tail, making him the heaviest and longest dog on record.
2. Benedictine Saint Bernard: This massive Saint Bernard weighed approximately 357 pounds (162 kg), earning him recognition as one of the heaviest dogs ever.
3. Hercules the English Mastiff: Hercules was awarded the distinction of World’s Biggest Dog by Guinness World Records, though specific weight details are limited.
4. Zeus the Great Dane: While primarily known for his height, Zeus also had a significant weight, contributing to his overall massive size.
5. Gibson the Great Dane: Gibson was previously named the “Tallest Dog in the World” by the Guinness Book of World Records, and he weighed a hefty 180 pounds
These remarkable dogs have left a memorable mark on the records, showcasing the extraordinary potential of canine growth.
Conclusion Owning large dog breeds – Are You Ready?
Owning a large dog breed isn’t just about having a giant fluffball to cuddle—it’s a lifestyle change. These working dogs need space, training, and a serious food budget. Whether it’s the Great Dane towering over your countertops or the English Mastiff claiming your entire couch, one thing’s for sure—you’ll never have a dull moment.
While some dogs tend to be more laid-back, others, like the Cane Corso and Black Russian Terrier, require early training to keep their protective instincts in check. Breeds like the Scottish Deerhound and Anatolian Shepherd Dog are strong-willed and need experienced owners who can handle their independence. But at the end of the day, even the most intimidating giant breeds are just lovable dogs at heart.
With many large dog breeds to choose from, whether you want a shepherd dog, a guardian, or just a gentle giant, there’s a perfect match for you. But be warned—puppies grow fast, and a tiny fluffball today can be 150 pounds of unstoppable love tomorrow.
So, if you’re ready for drool-covered floors, fur-coated furniture, and endless loyalty, a giant breed might just be your perfect companion. Just make sure you’ve got enough space, patience, and a very sturdy sofa!
The “10 Most Heavyweight Dog Breeds” showcase the diversity and majesty of large canine companions. These breeds, including the English Mastiff, Saint Bernard, and Great Dane, are renowned not only for their impressive size but also for their loyal and gentle nature. While their substantial weight necessitates mindful care and ample space, their presence often inspires both awe and affection. Understanding their unique needs ensures these majestic dogs lead healthy, fulfilling lives as cherished members of the family. Embracing a heavyweight breed offers a rewarding experience marked by deep bonds and mutual devotion.