Zeus Has Been Biggest Dog in the World on Multiple Occasions

Guinness World Records is known for tracking and verifying the most extraordinary feats worldwide. When it comes to documenting the largest dogs, the process of awarding titles is just as precise.

A dog must meet specific criteria and undergo a thorough verification process to earn a spot in the record books. For example, when a dog is recognized as the tallest, heaviest or longest dog, Guinness requires official measurements to be taken by a veterinarian or other qualified professional.

The dog's height is measured from the shoulder, while length is typically recorded from nose to tail. For weight, official scales are used to ensure accuracy.

Once the measurements are confirmed, Guinness World Records reviews the data. If the dog surpasses the required thresholds, the title is awarded.

Tallest Dog in the World

Zeus, a towering Great Dane from Otsego, Michigan, earned his place in the history books as the tallest dog ever recorded. Standing an astonishing 3 feet, 8 inches (112 cm) at the shoulder, Zeus reached an incredible 7 feet, 4 inches (224 cm) when on his hind legs.

Despite his imposing size, Zeus was known for his calm and affectionate nature. His owner, Kevin Doorlag, often described Zeus as a sweet-natured dog who loved meeting people, with his only "flaw" being his tendency to slobber on anyone within range.

Zeus's gentle demeanor made him an ideal therapy dog, and he frequently visited schools and hospitals, bringing comfort to those in need. His presence was a source of joy and awe to many, and his legacy lives on as a reminder of the extraordinary bond that can exist between humans and dogs.

Unfortunately, Zeus passed away in September 2014 at the age of 5, but his remarkable size and kind spirit continue to make him a memorable figure in the world of giant dogs.

Tallest Living Dog

The title of "Tallest Living Dog" was most recently held by Kevin, a majestic 3-year-old Great Dane from West Des Moines, Iowa. Standing at an impressive 3 feet, 2 inches (97 cm) tall at the shoulder, Kevin captured the attention of dog lovers around the world with his towering height and gentle demeanor.

Despite his stature, which would intimidate most, Kevin was known as a gentle giant. His owners described him as a sweet, calm companion who enjoyed lounging around and spending time with his family.

Sadly, Kevin's reign with the title was brief. Just two weeks after being awarded the title by Guinness World Records, he passed away unexpectedly.

As of now, Guinness World Records has not yet crowned a new record-holder. The last two dogs to hold the title of tallest living dog were also Great Danes — Zeus, from Texas, who held the title before Kevin, and the Zeus from Michigan who claimed the honor before him and still holds the title for the tallest known dog to ever live.

Great Danes, known for their immense size and gentle nature, have consistently been the tallest dog breed this title—winning this title for several years, often outpacing other breeds in terms of sheer height. For now, the title remains vacant, leaving dog enthusiasts eagerly awaiting the next giant to take the crown.

The title of the heaviest dog ever recorded goes to Aicama Zorba, an Old English Mastiff who made history in 1987.

Owned by Chris Eraclides of London, Zorba was a massive dog with an astonishing weight of 343 pounds (155.6 kg). Not only was Zorba incredibly heavy, but he was also extraordinarily long, measuring an impressive 8 feet, 3 inches (252 cm) from the tip of his nose to the end of his tail.

His size was truly monumental, and his record still stands as a testament to the sheer physicality of the Old English Mastiff breed, known for its impressive stature and muscular frame. Despite his enormous weight and towering presence, Zorba was described as a gentle and friendly dog, typical of the Old English Mastiff's calm and loyal temperament.

Mastiffs in general are known for their easygoing and affectionate nature, especially with their families, making them popular choices for those who appreciate both their grandeur and their gentle demeanor.

Since Zorba's reign, no dog has officially surpassed his weight, making his record a constant point of fascination for dog lovers and Guinness World Record enthusiasts. His name has become synonymous with giant dog breeds — particularly the Old English Mastiff — and he remains an enduring symbol of canine physicality and strength.

When it comes to the biggest dog breeds, size matters — both in height and weight. From towering giants to heavily muscled powerhouses, the largest dog breeds command attention with their imposing statures.

These breeds, recognized by organizations like the American Kennel Club (AKC), are known not only for their size but also for their impressive strength and gentle natures, making them beloved companions for those who appreciate large dogs.

While many people gravitate toward smaller dogs for their portability and ease of care, there's something truly awe-inspiring about a dog that can weigh as much as a human or stand taller than many adults. Among the most notable is the Neapolitan Mastiff, a breed that combines size with a deep loyalty to its family.

Whether towering over the smallest dog breeds or outweighing them by hundreds of pounds, these breeds are living examples of the diverse and powerful range of dogs within the canine family.

Also, while the Bernese Mountain Dog may not typically top the lists of largest breeds, they are part of a group of giant breeds that have long captured the hearts of dog lovers, coming in at 23 to 27 inches (58 to 69 cm), 70 to 115 pounds (32 to 52 kg).