Largest Mastiff Breeds Ranked by Height and Weight (2026)

As of 2026, the largest mastiff breed is the English Mastiff, which can stand over 30 inches tall at the shoulder and weigh up to 230 pounds. The Boerboel and Tosa Inu come next at up to about 200 pounds, with the Neapolitan and Tibetan Mastiffs close behind at around 150 pounds.

Below, we rank the largest mastiff breeds by height and weight, then cover each breed’s history, temperament and care needs. We also add practical notes on space, food and lifespan, because a dog this size changes daily life at home.

Mastiffs rank among the heaviest dogs in the world, with males weighing up to 230 pounds¹. These ancient and impressive canines are known for their muscular build, protective instincts, and gentle affection toward their families. Mastiffs have a rich history dating back thousands of years, serving as loyal companions and guard dogs across various civilizations. Understanding the traits and care requirements of these giant breeds is important for prospective owners considering one of these majestic animals.

This sits inside a bigger question: dog size categories explained.

Key Takeaways

• The English Mastiff is the largest mastiff breed, with males weighing up to 230 pounds¹
• Mastiffs are known for their impressive size, muscular build, and protective instincts, while also being gentle and affectionate with their families
• These ancient dogs have a rich history dating back thousands of years, serving as loyal companions and guard dogs across various civilizations
• Proper care and training are essential for big dogs like mastiffs due to their size and potential behavioral challenges
• Other large dog breeds include Boerboel, Tosa Inu, Saint Bernard, and Great Dane¹

Largest Mastiff Breeds Ranked by Height and Weight

Here is how each largest mastiff breed contender compares, ranked by the top weight cited in this article. Sizes vary by individual and by sex, and heights are listed only where the article gives one.

1. English Mastiff: over 30 inches at the shoulder, up to 230 pounds
2. Boerboel: up to 200 pounds (height not listed)
3. Tosa Inu: up to 200 pounds (height not listed)
4. Neapolitan Mastiff: up to about 150 pounds (height not listed)
5. Tibetan Mastiff: up to 150 pounds, over 26 inches tall

Size shapes daily life. Plan for plenty of floor space, a large bed or crate, and a food bill that grows with body weight. Giant breeds generally live shorter lives than small dogs, so ask your vet about health screening, feeding a large-breed puppy, and choosing a food with an AAFCO statement on the label. Make any food change over 7 to 10 days.

Introduction to Mastiff Breeds

Mastiff breeds are a captivating group of large, muscular dogs that have captivated dog enthusiasts for centuries. With their broad heads, wrinkled faces, and powerful builds, these majestic canines have a rich history dating back to ancient civilizations². Whether it’s the towering English Mastiff, the stocky Bullmastiff, or the massive Neapolitan Mastiff, each breed within the mastiff family has its own unique traits, temperament, and care requirements³. Size is what sets the largest mastiff breed apart from the rest of the group, but temperament and care needs matter just as much.

Defining Mastiff Breeds

Mastiffs are typically defined by their size, strength, and distinct physical characteristics. These dogs can weigh anywhere from 120 to 230 pounds², with the Neapolitan Mastiff often weighing over 150 pounds². Mastiffs are generally classified as giant breeds due to their large size and powerful build³. They have a short, dense coat that comes in various colors like fawn, brindle, and apricot³.

History and Origins of Mastiff Breeds

The mastiff breeds trace their origins back thousands of years, with evidence of similar large, powerful dogs being used in ancient civilizations such as Greece, Rome, and Egypt⁴. These dogs were prized for their strength, courage, and loyalty, and were often used in warfare, hunting, and guarding⁴. As these ancient civilizations expanded and interacted, the genetic pool of mastiff-type dogs grew, leading to the development of the various mastiff breeds we know today⁴.

The rich history and diverse origins of the mastiff breeds have contributed to their enduring popularity and status as one of the most iconic and recognizable dog breeds in the world⁴.

“Marco Polo mentioned Kubla Khan’s kennel of 5,000 Mastiffs used for hunting and war.”⁴

The mastiff’s long and storied past has left an indelible mark on the breed, shaping its physical characteristics, temperament, and role in human society. As we explore the diversity of mastiff breeds, we gain a deeper appreciation for this remarkable canine lineage and its enduring legacy.

What’s the Largest Mastiff Breed?

Among the largest mastiff breeds, the English Mastiff stands out as a true heavyweight champion. These impressive giants can reach heights of over 30 inches at the shoulder and weigh up to a staggering 230 pounds⁵. With their muscular, powerful build and calm, gentle temperament, English Mastiffs are the embodiment of the mastiff breed’s legendary strength and size.

While the English Mastiff may be the biggest of the mastiff breeds, other large mastiff-type dogs like the Boerboel, Tosa Inu, and Tibetan Mastiff can also reach impressive proportions. The Tibetan Mastiff, for example, is recognized by the American Kennel Club and is known for its distinctive long, fluffy coat⁵. These giant breeds, though less common than the English Mastiff, can still reach 150 to 200 pounds and tower over their canine counterparts.

Responsible ownership and careful consideration of the unique needs of these massive breeds are essential for their health and well-being. Mastiffs, including the English Mastiff, are prone to certain health issues like joint problems, bloat, and some cancers⁵. Providing proper care, nutrition, and exercise is important to help these gentle giants stay healthy.

In short, the English Mastiff is the largest mastiff breed, with its impressive size and powerful build. Other giant mastiff-type dogs like the Boerboel, Tosa Inu, and Tibetan Mastiff can also reach impressive proportions, showing the diversity within the mastiff family⁵⁶.

Other Contenders for the Largest Mastiff Breed

While the English Mastiff is often considered the largest mastiff breed, there are several other giant mastiff-type dogs that can rival its impressive size⁷. Among these are the Boerboel, Tosa Inu, Neapolitan Mastiff, and Tibetan Mastiff, each with its own unique history, characteristics, and challenges for owners.

Boerboel

Originating from South Africa, the Boerboel is a sturdy and athletic mastiff-type breed known for its protective instincts and impressive size⁷. Male Boerboels can weigh up to 200 pounds, making them one of the largest mastiff varieties⁷. These dogs were historically used for guarding homes and hunting big game, and they continue to be loyal and devoted companions⁷. Proper training and socialization is important for Boerboels, as their protective nature can lead to potential issues with strangers if not properly managed.

Tosa Inu

The Tosa Inu, also known as the Japanese Mastiff, is a large breed that emerged from a crossbreeding program involving various Western mastiff-type dogs and traditional Japanese Inu breeds⁷. Tosa Inus can reach up to 200 pounds, making them another contender for the title of largest mastiff breed⁷. This breed is highly respected in Japan, where they were historically used in dog fighting competitions⁸. While Tosa Inus can make loyal and protective family companions, their territorial nature and potential for aggression toward other dogs require significant training and socialization from a young age.

Neapolitan Mastiff

Originating from Italy, the Neapolitan Mastiff is a unique mastiff variety known for its massive, wrinkled appearance and calm, protective temperament⁷. Male Neapolitan Mastiffs can weigh up to 150 pounds, making them slightly smaller than the English Mastiff but still an impressively large breed⁷. Despite their intimidating looks, Neapolitan Mastiffs are typically gentle giants that form strong bonds with their families⁸. Their size and guarding instincts still call for early and consistent training so they are well-behaved and socialized.

Tibetan Mastiff

The Tibetan Mastiff, also known as the “Guardian of the Himalayas,” is a massive and powerful breed that originates from the mountainous regions of Tibet⁷. While not considered a true mastiff by some, the Tibetan Mastiff is recognized as such by the American Kennel Club⁸. These dogs can weigh up to 150 pounds and stand over 26 inches tall, making them one of the largest mastiff-type breeds⁷. Tibetan Mastiffs are known for their independent, aloof nature and strong protective instincts, which call for experienced owners who can provide early training and socialization to manage these traits effectively.

Overall, these giant mastiff varieties showcase the incredible diversity and impressive size of the mastiff breed group⁷. While each breed has its own unique characteristics and challenges, they all share a common heritage as powerful, loyal, and often intimidating canine companions⁸. Proper research, preparation, and responsible ownership are essential when considering these giant breeds as part of your family.

Final Thoughts on the Largest Mastiff Breed

The mastiff breeds are some of the largest and most impressive dogs in the world, with the English Mastiff considered the largest mastiff breed of the group⁹. These giant dogs trace their origins back thousands of years and were prized throughout history for their strength, courage, and loyalty. While the English Mastiff may be the largest, other mastiff varieties like the Boerboel⁹, Tosa Inu⁹, Neapolitan Mastiff⁹, and Tibetan Mastiff⁹ can also reach impressive sizes and possess unique traits.

Among other giant breeds, the Saint Bernard is often listed as one of the heaviest, with males weighing between 140 and 180 pounds and females weighing between 120 and 140 pounds¹⁰. Other giant breeds, such as the Caucasian Shepherd¹⁰, English Mastiff¹⁰, and Great Dane¹⁰, can also reach truly massive proportions⁹. Responsible ownership and careful consideration of the specific needs of these massive breeds are essential for their health, wellbeing, and successful integration into a family home.

Whether you’re drawn to the towering presence of the Mastiff¹¹, the gentle nature of the Leonberger¹¹, or the protective instinct of the Kangal Shepherd Dog¹¹, these giant mastiff breeds offer a unique and awe-inspiring experience for dedicated dog owners. By understanding the key facts about these massive canines, you can make an informed decision and give your dog the best possible care.

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