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Top 7 Giant Dog Breeds That Weigh In At Over 100 Pounds

By: Ejay Camposano
A college graduate with a degree in Electrical Engineering, Ejay has a diverse background that combines technical expertise with a passion for pets and is now one of the content writers at IHD. Read more
| October 3, 2024

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When it comes to giant dog breeds, these massive canines are more than just big—they’re majestic, powerful, and often gentle giants with equally big hearts. Many of these dogs were bred for tasks requiring strength, endurance, and sometimes even guarding large flocks or estates. Despite their imposing size, giant dog breeds often have gentle temperaments, making them wonderful companions for those who have the space and time to care for them. Each of these massive breeds weighs over 100 pounds, bringing a unique presence to any home.

Saint Bernard

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Known for their iconic roles as mountain rescue dogs in the Swiss Alps, Saint Bernards is one of the most well-recognized giant dog breeds. These gentle giants can weigh anywhere from 120 to 180 pounds, depending on their gender and overall build. Bred to work in cold, snowy conditions, Saint Bernards have thick, dense coats that help them stay warm while searching for lost travelers. Despite their massive size, Saint Bernards are known for being calm, gentle, and incredibly loyal. Their affectionate nature makes them wonderful family pets, though their large size means they need plenty of space to roam and stretch out.

Newfoundland

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Newfoundlands are another breed that fits perfectly into the giant dog category, often tipping the scales at over 100 pounds, with some males reaching as much as 150 pounds or more. These dogs were originally bred to assist fishermen in Newfoundland, Canada, and their webbed feet and strong swimming abilities make them excellent water dogs. Known for their gentle and patient nature, Newfoundlands are often called “nanny dogs” because of how well they get along with children. Their sweet temperaments and impressive size make them perfect companions for families, especially those with an affinity for the great outdoors.

Great Dane

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The Great Dane, often called the “Apollo of dogs,” is one of the tallest dog breeds in the world. While their height is often their most striking feature, their weight can exceed 100 pounds, with some males weighing as much as 200 pounds or more. Despite their towering appearance, Great Danes are known for being gentle, affectionate, and surprisingly graceful. They were originally bred as hunting dogs but are beloved family companions today. Their calm demeanor makes them excellent pets for those with the space to accommodate their size. Just be prepared for the sheer size of these lovable dogs—they’re known to think they’re lap dogs, despite their massive frames!

Mastiff

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Mastiffs are one of the heaviest dog breeds, with males easily weighing in at over 200 pounds. These gentle giants were originally bred as guard dogs, and their imposing size and muscular build make them natural protectors. Despite their intimidating appearance, Mastiffs are incredibly loyal and affectionate with their families. They are known for being calm and good-natured, making them wonderful companions for those who appreciate a dog with a laid-back personality. However, their large size requires a strong handler and plenty of room to move around. Mastiffs are perfect for families who want a protective yet loving pet by their side.

Irish Wolfhound

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The Irish Wolfhound is another towering giant in the dog world, with some individuals standing over three feet tall at the shoulder and weighing well over 100 pounds. These dogs were originally bred to hunt wolves in Ireland, and their speed and strength made them formidable hunters. Irish Wolfhounds are known for their gentle and calm temperament despite their impressive size. They are often described as “gentle giants” and make wonderful family companions. Irish Wolfhounds do best in homes with plenty of space to stretch out and exercise, as their long legs and large size require room to roam.

Leonberger

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Leonbergers are large, majestic dogs weighing between 100 and 170 pounds, depending on gender and build. These dogs were bred as versatile working dogs, excelling in cart pulling and water rescue tasks. They have a thick, lion-like mane and a dignified presence that makes them stand out. Despite their size and strength, Leonbergers are known for their gentle and affectionate nature. They are excellent family dogs, known for being patient and protective of children. Leonbergers are also highly intelligent and thrive in environments with plenty of mental and physical stimulation.

Bernese Mountain Dog

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The Bernese Mountain Dog is a strikingly beautiful breed that was originally bred in Switzerland as a working dog for farms. These dogs are incredibly strong and are often used for tasks such as pulling carts and herding livestock. With their thick, tricolored coats, Bernese Mountain Dogs are powerful and visually stunning. They typically weigh between 80 and 115 pounds, though some males can easily exceed 120 pounds. Known for their calm and affectionate nature, Bernese Mountain Dogs make excellent family companions. They are particularly good with children and have a gentle, easygoing personality, making them a joy to be around.

Gentle Giants With A Big Heart

While these giant dog breeds may have massive frames, their hearts are just as big—if not bigger! With their protective instincts, loving nature, and gentle demeanor, these dogs offer a level of companionship that matches their size. However, owning a giant breed comes with challenges, from accommodating their large appetites to ensuring they have enough space to roam. But these gentle giants make incredibly rewarding and loyal companions for those up for the task, filling homes with love and affection.