Biggest Dog Breeds: Meet the Gentle Giants
There’s just something about big dogs that’s hard not to notice. They don’t exactly walk into a room and quietly blend in. A Great Dane can be standing next to you looking almost like a horse, while an English Mastiff can somehow take up what feels like the entire sofa.
I remember seeing a huge dog once and thinking, “There is absolutely no way that thing thinks it’s just a dog.” And then, within a few minutes, it was happily leaning against its owner and asking for attention like a tiny puppy.
That’s probably my favorite thing about giant breeds. They can look so serious and intimidating, but many of them are complete babies when it comes to their families.
Of course, having a giant dog comes with a few extra things to think about. They eat more, need bigger and stronger supplies, and need enough space to move around comfortably.
You also have to pay more attention to training, their joints, and their overall health. But if you’re ready for that, you get a loyal, loving companion with a personality that’s just as big as they are.
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Biggest Dog Breeds Chart
When you think of the biggest dog breeds, Great Danes, huge Mastiffs, and fluffy Saint Bernards probably come to mind. But there’s actually a lot more to these dogs than just being really, really big.
Some giant dogs are super relaxed and would happily spend most of the day sleeping next to you. Others can be playful, protective, independent, or full of energy. Of course, their size also means you have a few extra things to think about, like what they eat, how much exercise they get, grooming, how much space they need, and keeping an eye on their health. .
| Breed | Approx. Height | Approx. Weight | Personality |
| English Mastiff | 27.5–30+ inches | 120–230+ lbs | Calm, loyal, protective |
| Great Dane | 28–34 inches | 110–175 lbs | Friendly, playful, affectionate |
| Saint Bernard | 26–30 inches | 120–180 lbs | Gentle, patient, loving |
| Irish Wolfhound | 30–32+ inches | 105–180 lbs | Calm, dignified, gentle |
| Leonberger | 25.5–31.5 inches | 90–170 lbs | Affectionate, balanced, social |
| Tibetan Mastiff | 24–26+ inches | 70–150+ lbs | Independent, protective |
| Newfoundland | 26–28 inches | 100–150+ lbs | Sweet, gentle, devoted |
Top 10 Biggest Dog Breeds List Chart
Big dogs can have completely different personalities. Some are sweet, gentle family dogs that just want to be around their people, while others were bred to protect homes, look after livestock, or work alongside humans.
Here are 10 of the biggest dog breeds you’ll probably want to know about: English Mastiff, Great Dane, Saint Bernard, Irish Wolfhound, Leonberger, Tibetan Mastiff, Newfoundland, Great Pyrenees, Anatolian Shepherd, and Neapolitan Mastiff.
And if you’re thinking about getting a giant dog, keep in mind that being big doesn’t always mean being full of energy.
Some of these dogs are pretty chill and happy to relax at home, while others need regular exercise, playtime, and things to keep their minds busy.
| Breed | Height | Weight | Lifespan | Note |
| English Mastiff | 68-81 cm | 120-230 lbs | 6-10 years | Heaviest dog breed in the world; gentle giant, calm protector. |
| Great Dane | 71-86 cm | 110-175 lbs | 7-10 years | Tallest dog breed; elegant, friendly, and affectionate. |
| Saint Bernard | 66-76 cm | 120-200 lbs | 8-10 years | Swiss rescue dog; loyal, loving, and powerful. |
| Newfoundland | 66-71 cm | 100-150 lbs | 9-11 years | Strong swimmer, used for water rescues; very gentle. |
| Irish Wolfhound | 76-89 cm | 105-140 lbs | 6-9 years | Tallest sighthound; historic hunting breed, calm and noble. |
| Leonberger | 66-79 cm | 90-170 lbs | 8-10 years | Majestic working breed; gentle, great with families. |
| Tibetan Mastiff | 61-76 cm | 90-150 lbs | 10-12 years | Ancient guardian breed; powerful and independent. |
| Caucasian Shepherd (Ovcharka) | 64-76 cm | 100-200 lbs | 10-12 years | Fierce guardian; protective livestock dog from Caucasus. |
| Anatolian Shepherd | 69-74 cm | 90-150 lbs | 11-13 years | Turkish livestock guardian; loyal, strong, and independent. |
| Bernese Mountain Dog | 58-71 cm | 70-115 lbs | 7-10 years | Swiss working breed; affectionate and family-friendly. |
English Mastiff: The Ultimate Gentle Giant
If we’re talking about sheer bulk, the English Mastiff is hard to beat. These dogs have enormous bodies, broad heads, and a calm expression that somehow makes them look both intimidating and incredibly sweet.
The breed is famous for its impressive weight, and Zorba, an English Mastiff, is often cited as one of the heaviest dogs ever recorded, reportedly weighing around 343 pounds. Individual dogs today are generally much smaller than that record-holder.
Traits of English Mastiffs:
- Extremely loyal and devoted to their families.
- Naturally protective without always being aggressive.
- Usually calm and relaxed indoors.
- Can be surprisingly affectionate and clingy.
Great Dane: The Tallest of Them All
When it comes to height, the Great Dane is pretty much the star of the giant-dog world. With those super long legs and tall, slim body, they can look almost unreal when they’re standing next to a person. You might honestly do a double take the first time you see one.
Some Great Danes can reach more than 7 feet tall when they stand on their back legs, which is honestly crazy to imagine. But despite their huge size, they’re usually sweet, friendly, and a little goofy.
Most of them just want to hang around their family, get some attention, and feel like they’re part of everything..
- Height: Around 28–34 inches.
- Weight: Around 110–175 lbs.
- Temperament: Friendly, affectionate, playful, and gentle.
Saint Bernard: The Legendary Rescuer
Saint Bernards have a pretty interesting history, especially because of the work they did in the snowy Swiss Alps. These big dogs became well known for helping travelers who got stuck or lost in the mountains.
Their thick coats helped keep them warm in the freezing weather, and their strong bodies made it easier for them to handle the tough conditions. Basically, they were built for the kind of cold and difficult work that would be too much for most dogs.
Quick traits:
- Strong and muscular with a weather-resistant coat.
- Patient, affectionate, and generally gentle.
- Known for their history as rescue dogs.
- Drooling can be very much part of everyday life.
Saint Bernards can be wonderful family dogs, but their size means they can accidentally knock over toddlers or small children. Supervision and basic obedience training are important.
Irish Wolfhound: Noble Hunter
The Irish Wolfhound is one of those dogs that you can’t really miss. They’re incredibly tall, with long legs and a strong, athletic build, so they definitely make people stop and look. They were originally bred to hunt wolves and other large animals, which explains their size and strength.
But don’t let that hunting background fool you. Irish Wolfhounds are usually pretty gentle and calm, especially around their families. Despite looking so big and serious, they’re often just sweet dogs that enjoy being around their people.
- Height: Around 30–32+ inches.
- Weight: Around 105–180 lbs.
- Traits: Gentle, intelligent, dignified, and easygoing.
One difficult part of owning an Irish Wolfhound is its relatively short lifespan compared with many smaller breeds. Their average lifespan is often around 6–8 years.
Leonberger: The Family Lion
The Leonberger is a pretty hard dog to miss. That huge mane around its neck is probably the first thing you’ll notice, and it’s also where the lion-like look comes from.
They were developed in Germany and were bred to be strong working dogs, but they’re also known for being quite easygoing around their families.
Leonberger Highlights:
- Patient and affectionate with children.
- Protective without usually being overly aggressive.
- Social and devoted to their families.
- Need regular brushing because of their thick double coat.
They tend to enjoy being around their people and can make great family dogs when they’re properly trained and socialized. Just keep in mind that all that beautiful fur needs regular grooming, and a dog this size definitely needs enough room to move around comfortably.
Tibetan Mastiff: Fierce Guardian of the Himalayas
The Tibetan Mastiff is the kind of dog that looks like it belongs in an old mountain story. That huge coat and serious face give it a very strong presence, and there’s a good reason for that.
These dogs were raised in the Himalayan region to watch over homes, animals and monasteries, so being alert is pretty much in their nature.
- Height: Around 24–26+ inches.
- Weight: Often 70–150+ lbs, with considerable variation.
- Temperament: Independent, protective, loyal, and strong-willed.
They’re also not really the “easy first dog” type. A Tibetan Mastiff can be very stubborn and likes doing things its own way, especially if it doesn’t see a reason to listen.
If you’re going to own one, you’ll need to start training early and be consistent with it. Socializing them from a young age is important too, otherwise they can become overly suspicious of strangers.
Newfoundland: The Water Rescue Expert
Newfoundlands are one of those dogs that look huge and fluffy, but then you see them in water and realise they’re actually pretty capable swimmers too.
They come from Newfoundland, Canada, where they were used by fishermen for all sorts of jobs. They helped with pulling things, working around boats and even getting people out of the water when needed.
A big part of what makes them so good in water is their build. Their wide paws help them paddle, their strong bodies keep them moving and that thick coat gives them some protection from the cold.
They can also be a little messy, especially after a swim, so don’t be surprised if you end up with water and fur everywhere. Still, they’re usually sweet, friendly dogs and that lovable personality makes the mess pretty easy to forgive.
Traits:
- Sweet, gentle, and affectionate.
- Often excellent with children.
- Loyal and protective without being overly aggressive.
- Require regular grooming and shed heavily.
Caring for the Biggest Dog Breeds
Owning one of the biggest dog breeds requires a little more planning than owning an average-sized dog.
Feeding Needs:
Giant breeds naturally eat more, but don’t simply feed based on size. Their age, weight, activity level, and individual health all matter. Ask your veterinarian about an appropriate diet and portion size.
Exercise:
Giant dogs need regular exercise, but it doesn’t have to be anything too intense. Daily walks and some playtime can usually keep them happy and active. With puppies, take it a little easier. Their joints are still growing, so too much running or jumping can cause problems later on.
Living Space:
A huge backyard isn’t always mandatory, but giant dogs need enough room to move comfortably. A small, cramped space can become difficult when your dog weighs 150 pounds.
Health Considerations:
Giant breeds can be more prone to problems such as hip and elbow dysplasia, arthritis, heart conditions, and bloat. Regular veterinary checkups are especially important.
Rare Giant Dog Breeds You May Not Know
The English Mastiff and Great Dane tend to steal the spotlight, but they certainly aren’t the only impressive large dog breeds out there. Some giant breeds are much less common and have fascinating histories of their own.
The Caucasian Shepherd Dog, Boerboel, Dogue de Bordeaux, Neapolitan Mastiff, Spanish Mastiff, and Central Asian Shepherd Dog are all worth learning about. Their personalities can range from calm and affectionate to intensely protective and independent.
Just remember that a rare or unusual giant breed isn’t necessarily easier to own. In fact, some were specifically bred for serious guarding or working roles and require experienced owners.
| Dog Breed | Origin Country | Average Size | Notable Trait |
| Caucasian Shepherd | Russia/Georgia | 27-30 in, 110-220 lbs | Fierce guardian of livestock |
| Boerboel | South Africa | 24-28 in, 110-200 lbs | Bred as a farm protector |
| Anatolian Shepherd | Turkey | 27-32 in, 90-150 lbs | Independent, protective |
| Pyrenean Mastiff | Spain | 25-31 in, 120-180 lbs | Gentle yet watchful |
| Kuvasz | Hungary | 26-30 in, 100-130 lbs | Loyal protector, fluffy coat |
| Great Pyrenees | France/Spain | 27-32 in, 100-160 lbs | Calm, family-friendly guardian |
List of All Big Dog Breeds
There are far too many large and giant breeds to squeeze into one small list, but some of the most recognizable include English Mastiff, Great Dane, Saint Bernard, Irish Wolfhound, Leonberger, Tibetan Mastiff, Newfoundland, Great Pyrenees, Anatolian Shepherd, Neapolitan Mastiff, Dogue de Bordeaux, Boerboel, Cane Corso, Caucasian Shepherd Dog, Central Asian Shepherd Dog, Scottish Deerhound, Bernese Mountain Dog, and Black Russian Terrier.
Each breed has different requirements, so don’t choose one based purely on weight or height. A giant dog that matches your lifestyle will be much happier than one chosen simply because it looks impressive.
Large Dog Breeds With Long Hair
If you love the idea of a huge dog with a beautiful fluffy coat, there are plenty to choose from. Long-haired large dog breeds can be gorgeous, but that beautiful coat usually comes with a little extra work.
Brushing them a few times a week can keep the coat in better shape and get rid of all that loose fur. And during shedding season, be prepared to find hair on your clothes, sofa and probably places you didn’t even know your dog had been.
| Breed | Coat | Grooming Needs | Personality |
| Newfoundland | Long, thick | High | Gentle, sweet |
| Leonberger | Long, double coat | High | Affectionate, balanced |
| Saint Bernard | Long or short | Moderate–High | Patient, friendly |
| Great Pyrenees | Long, thick | High | Calm, protective |
| Tibetan Mastiff | Long, dense | Moderate–High | Independent, protective |
Large Dog Breeds Short Hair
Short-haired giant breeds can be easier to maintain when it comes to brushing, but don’t assume that short hair means no shedding. Many large short-coated dogs still leave plenty of fur around the house.
Their coats usually need simple brushing, occasional bathing, and regular skin checks.
| Breed | Coat | Grooming Needs | Personality |
| English Mastiff | Short | Low–Moderate | Calm, loyal |
| Great Dane | Short | Low | Friendly, playful |
| Cane Corso | Short | Low | Protective, confident |
| Boerboel | Short | Low | Loyal, powerful |
| Dogue de Bordeaux | Short | Low–Moderate | Calm, devoted |
Large Dog Breeds UK
The UK is known for quite a few big dog breeds, and many of them were originally bred for work rather than just being family pets. English Mastiffs, Scottish Deerhounds and Bullmastiffs are some well-known examples, and you’ll also come across other large breeds that are popular with UK dog owners.
But if you’re looking for large dog breeds in the UK, don’t just pick one because it looks cute. A giant dog can take up a lot of space and usually comes with its own needs.
Think about how much exercise you can give, how much grooming you’re okay with and whether your home actually has enough room for a dog that big.
| Breed | Origin | Approx. Size | Key Trait |
| English Mastiff | England | Giant | Calm and loyal |
| Bullmastiff | England | Large/Giant | Protective |
| Scottish Deerhound | Scotland | Giant | Gentle and athletic |
| Great Dane | Germany | Giant | Tall and friendly |
| Newfoundland | Canada | Giant | Excellent swimmer |
Large Dog Breeds Australia
Living with a big dog in Australia means you have to think about the weather too. Some parts can get seriously hot, so a thick-coated breed may need extra care during summer.
You’ll also want to think about how much space you have and whether you can give the dog enough exercise without pushing it too hard in the heat.
There are quite a few larger breeds you’ll see in Australian homes, including Great Danes, Greyhounds, Bullmastiffs, Rottweilers and Australian Shepherds.
They’re all pretty different though, so it really comes down to your lifestyle. A dog that suits someone with a big yard and an active routine might not be the best fit for someone living in a smaller place.
| Breed | Size | Exercise Needs | Coat |
| Great Dane | Giant | Moderate | Short |
| Greyhound | Large | Moderate | Short |
| Bullmastiff | Large/Giant | Moderate | Short |
| Rottweiler | Large | Moderate–High | Short |
| Australian Shepherd | Medium–Large | High | Medium |
Health Concerns in the Biggest Dog Breeds
With giant dogs, their size can also mean a few more health things to keep an eye on. Problems with their hips, elbows and joints are fairly common, and some breeds can also be prone to heart issues as they get older. Regular vet visits can help catch problems before they get worse.
One thing every giant-dog owner should know about is bloat, or GDV. It can happen very suddenly and needs urgent treatment, so knowing the signs like a swollen belly, restlessness or repeated attempts to vomit can really matter. If something seems off, don’t wait around, call a vet.
Keeping their weight under control is important too. Even a few extra kilos can put a lot of pressure on those already-big joints. Good food, sensible exercise and regular checkups can help your dog stay comfortable and enjoy life without putting extra strain on their body.
FAQs
Which dog is officially the biggest breed in the world?
There isn’t one answer because “biggest” can mean different things. English Mastiffs are among the heaviest breeds, while Great Danes are generally recognized for exceptional height.
Do giant dog breeds live long lives?
Most giant breeds have shorter lifespans than smaller dogs, with many commonly living around 6–10 years, although individual dogs can live longer.
Are the biggest dog breeds good with kids and families?
Many are wonderfully gentle and affectionate with families, but their size means supervision around very young children is important.
Do large dogs cost more to maintain?
Yes. Food, veterinary care, beds, crates, collars, medications, and other supplies can all cost more when you have a giant dog.
Are giant dog breeds difficult to train?
Not necessarily. Many are intelligent and eager to please, but early socialization, consistent training, and good manners are especially important when a dog is powerful enough to accidentally knock someone over.