What Dog Is the Largest? | Top Giant Dog Breeds Ranked

ByDr. Michael

If you’ve ever asked yourself “What dog is the largest?”, you’re not alone. Dog lovers around the world are fascinated by giant dog breeds—those majestic canines that stand taller, weigh more, and often have hearts just as massive. From the towering Great Dane to the powerful English Mastiff, this article dives into the world of the largest dogs, comparing breeds by height, weight, and temperament.

Table of Contents

What Defines a “Large” Dog?

While many dogs are considered large at 70+ pounds, the largest dog breeds go far beyond that. Giant dogs are typically classified by:

  • Weight: 100 pounds (45 kg) or more
  • Height: Often exceeding 30 inches at the shoulder
  • Build: Broad, muscular, and substantial in stature

Let’s now explore some of the most awe-inspiring, record-breaking dogs in the world.

Great Dane – The Tallest Dog

The Great Dane is often hailed as the tallest dog breed. These gentle giants can reach heights of up to 34 inches at the shoulder, and some individuals stand over 7 feet tall when on their hind legs.

  • Weight: 100–200 lbs
  • Height: 28–34 inches
  • Temperament: Friendly, dependable, affectionate

The world record for the tallest dog ever recorded belongs to a Great Dane named Zeus, who stood 44 inches at the shoulder.

English Mastiff – The Heaviest Dog

While the Great Dane is the tallest, the English Mastiff takes the crown for the heaviest dog breed. Some males can weigh over 250 pounds!

  • Weight: 160–230+ lbs
  • Height: 27–32 inches
  • Temperament: Calm, courageous, loyal

An English Mastiff named Zorba once held the world record for the heaviest dog, weighing an astonishing 343 pounds (156 kg).

what dog is the largest

Saint Bernard – The Gentle Giant

Saint Bernards are renowned for their rescue work in the Swiss Alps and for their massive, cuddly appearance.

  • Weight: 120–180 lbs
  • Height: 26–30 inches
  • Temperament: Patient, friendly, loving

Their thick coats and kind nature make them excellent family dogs for colder climates.

Irish Wolfhound – The Noble Hunter

One of the oldest and tallest breeds, the Irish Wolfhound was bred for hunting wolves in Ireland.

  • Weight: 110–180 lbs
  • Height: 32–35 inches
  • Temperament: Gentle, intelligent, dignified

Despite their hunting roots, Irish Wolfhounds are known for their calm demeanor and strong loyalty to their families.

Leonberger – The Lion-Like Companion

Named for their lion-like mane and regal appearance, Leonbergers are as affectionate as they are large.

  • Weight: 100–170 lbs
  • Height: 26–32 inches
  • Temperament: Friendly, playful, loyal

They make great companions for active families who have space and time to care for them properly.

Tibetan Mastiff – The Ancient Guardian

Originally bred to guard livestock in the Himalayas, the Tibetan Mastiff is an independent and protective breed.

  • Weight: 90–150 lbs
  • Height: 24–30 inches
  • Temperament: Reserved, protective, strong-willed

They have thick coats and need early socialization to thrive in modern homes.

Living with Giant Dog Breeds

Owning a giant dog is a big responsibility—literally. Consider the following before choosing one:

  • Space Requirements: They need room to move, stretch, and rest.
  • Exercise Needs: Despite their size, many large dogs enjoy moderate exercise and long walks.
  • Health Care: Larger breeds often face joint issues and shorter life spans. Vet checkups are crucial.
  • Diet: They eat significantly more than small breeds and require balanced nutrition to avoid obesity.

Frequently Asked Questions

What is the biggest dog breed in the world?

The English Mastiff holds the record for the heaviest breed, while the Great Dane is the tallest.

Do large dog breeds have shorter lifespans?

Yes, most giant breeds live between 6 to 10 years due to their size-related health issues.

Are big dogs harder to train?

Not necessarily. Many large dogs are intelligent and eager to please, but early training and socialization are key.

Is it safe to have a giant dog around children?

Yes, many large breeds are gentle with kids. Always supervise interactions and train both the dog and the children.

Which giant breed is best for families?

Saint Bernards, Leonbergers, and Newfoundlands are often considered excellent family dogs due to their calm, loving nature.

Conclusion

So, what dog is the largest? The answer depends on whether you measure by height or weight—but either way, giant breeds like the Great Dane, English Mastiff, and Saint Bernard top the list. These majestic dogs are more than just impressive—they’re loyal, affectionate companions that can bring a big presence and even bigger joy to the right home. If you have the space, time, and resources, a giant breed could be your perfect gentle giant.

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