Biggest Dog Breed in the World: 10 Giants Ranked by Size (2026 Guide)
Discover the biggest dog breed in the world with our ranked guide covering weight, height, temperament, costs, and which giant breed fits your lifestyle.
What Makes a Dog the "Biggest"? Our Selection Criteria
When people search for the biggest dog breed in the world, they're usually asking one of two questions: which breed is the tallest, or which is the heaviest? The answer changes depending on which metric you prioritize. A Great Dane may tower over a Mastiff, but an English Mastiff will outweigh most Great Danes by 40-80 pounds.
For this list, we evaluated breeds using a composite "giant score" based on:
- Typical adult male weight (primary factor — reflects overall mass)
- Shoulder height (secondary factor — reflects stature)
- AKC/FCI breed standard minimums (verified against official registries)
- Bone density and frame structure (heavy-boned vs. lean giants)
All 10 breeds on this list have males that typically exceed 100 lb (45 kg) and/or stand over 27 inches (69 cm) at the shoulder. We excluded breeds where only rare outliers reach giant size, focusing instead on breeds where most individuals qualify as giants.
Before we get to the rankings, a practical reality check: giant breeds come with giant responsibilities. Annual care costs for a 150+ lb dog typically run $2,500–$4,500, including food ($80–$150/month for premium kibble), joint supplements, and breed-specific health screenings. According to the American Kennel Club, giant breeds also have shorter lifespans — typically 6–10 years — due to the metabolic and orthopedic strain of their size.
The 10 Biggest Dog Breeds in the World, Ranked
We've organized these breeds from heaviest overall mass to tallest overall stature, since "biggest" most often means total body mass in practical terms (doorway clearance, vehicle space, furniture weight limits).
1. English Mastiff — The Heaviest Breed on Earth
Size class: Super Giant | Male weight: 160–230 lb (73–104 kg) | Height: 30+ inches (76 cm)
Key giant trait: Highest average body mass of any recognized breed. The AKC breed standard sets a minimum male weight of 160 lb, but many well-built males exceed 200 lb. The record-holding English Mastiff, Zorba, weighed 343 lb (156 kg) — the heaviest dog ever documented.
Ranking rationale: No other breed consistently produces individuals this heavy. English Mastiffs combine massive skeletal structure with substantial muscle and a broad, deep chest. Their sheer width and density make them the undisputed heavyweight champion.
Profile: Despite their intimidating size, English Mastiffs are famously calm and gentle — often called "couch potatoes" by owners. They bond deeply with family, are patient with children, and tend to be reserved but not aggressive with strangers. Their exercise needs are moderate (30–45 minutes of walking daily), but they need significant indoor space simply to move comfortably.
2. Saint Bernard — The Alpine Giant
Size class: Super Giant | Male weight: 140–180 lb (64–82 kg) | Height: 28–30 inches (71–76 cm)
Key giant trait: Exceptional overall bulk combined with a dense, heavily muscled frame. Males routinely surpass 160 lb with proper conditioning.
Ranking rationale: Saint Bernards carry their weight across a broader, more compact frame than most giants, giving them extraordinary density. Their barrel chest and thick bone structure mean they often weigh more than breeds that appear taller.
Profile: Originally bred for Alpine rescue work in Switzerland, Saint Bernards are gentle, eager-to-please companions. They're notably patient and thrive in families. Their thick double coat requires weekly brushing and heavy seasonal shedding. Drooling is significant — keep a towel handy.
3. Boerboel — The South African Powerhouse
Size class: Super Giant | Male weight: 150–200 lb (68–91 kg) | Height: 24–27 inches (61–69 cm)
Key giant trait: Highest muscle-to-height ratio among giants. Boerboels are shorter than Great Danes but carry significantly more lean muscle mass per inch of height.
Ranking rationale: This South African mastiff-type breed is built like a canine linebacker. Their dense musculature and heavy bone mean they often outweigh taller breeds. The AKC recognizes them in the Working Group, where their guardian instincts and physical power are hallmarks.
Profile: Boerboels are confident, territorial protectors that need experienced handlers. They're devoted to family but can be aloof with strangers and dog-aggressive without proper socialization. This is not a first-time-owner breed. Early, extensive positive-reinforcement socialization is essential. Expect 60–90 minutes of structured exercise daily.
4. Neapolitan Mastiff — The Wrinkled Titan
Size class: Super Giant | Male weight: 150–165 lb (68–75 kg) | Height: 26–31 inches (66–79 cm)
Key giant trait: Massive loose skin and heavy bone create a deceptively larger appearance. Males are stocky, low-slung powerhouses.
Ranking rationale: Neapolitan Mastiffs carry extraordinary mass in a compact, rectangular frame. Their thick, loose skin adds visual bulk, and their heavy skeletal structure supports substantial weight. They rank here because their average mass consistently places them among the top five heaviest breeds.
Profile: An ancient Italian guardian breed, the Neo is calm, watchful, and deeply loyal. They're not hyperactive but need mental engagement and consistent training. Their extensive skin folds require daily cleaning to prevent infection. Drooling is extreme. Best suited for experienced owners with space for a large, low-energy companion.
5. Great Dane — The Tallest Breed in the World
Size class: Giant (Tall) | Male weight: 140–175 lb (64–79 kg) | Height: 30–32 inches (76–81 cm)
Key giant trait: Greatest shoulder height of any breed. The current tallest living dog, Zeus (a Great Dane), measured 41 inches at the shoulder. Males must be at least 30 inches per the AKC breed standard.
Ranking rationale: While Great Danes are leaner than mastiff-type breeds, their vertical stature is unmatched. A 32-inch Dane standing on hind legs can easily reach 7 feet. They rank slightly lower on pure mass, but no breed dominates the "tallest" metric.
Profile: Known as "gentle giants," Great Danes are friendly, patient, and surprisingly good apartment dogs (they're couch-lovers despite their size). Their short coat is easy to maintain. Key health concern: gastric dilatation-volvulus (bloat), which affects deep-chested breeds. Prophylactic gastropexy surgery ($300–$800) is commonly recommended during spay/neuter.
6. Leonberger — The Lion-Looking Giant
Size class: Giant | Male weight: 120–170 lb (54–77 kg) | Height: 28–31.5 inches (71–80 cm)
Key giant trait: Combines tall stature with substantial weight and a dramatic lion-like mane (in males). Their balanced proportions mean they carry mass gracefully.
Ranking rationale: Leonbergers sit at the intersection of height and weight — taller than mastiff breeds, heavier than sighthounds. Their versatility and balanced build earn them a solid spot among the world's biggest breeds.
Profile: Originally bred in Leonberg, Germany, as a multi-purpose farm and family dog, Leonbergers are confident, friendly, and moderately active. They excel in water rescue, cart pulling, and therapy work. Their double coat requires brushing 2–3 times weekly. They tend to be less drooly than other mastiff-type giants.
7. Newfoundland — The Gentle Water Giant
Size class: Giant | Male weight: 130–150 lb (59–68 kg) | Height: 28 inches (71 cm)
Key giant trait: Dense, water-resistant double coat adds significant visual bulk on top of an already massive frame. Their webbed feet and powerful build reflect their water-rescue heritage.
Ranking rationale: Newfoundlands carry substantial mass in a moderately tall frame. Their thick coat and broad chest make them appear even larger than their measured weight suggests. They consistently rank among the heaviest working breeds.
Profile: Called "nature's babysitter" for their legendary patience with children, Newfoundlands are sweet, trainable, and thrive on companionship. They love water and will attempt to "rescue" anyone in a pool. Expect heavy shedding, significant drool, and a need for 45–60 minutes of daily exercise. Hip and elbow dysplasia screening is essential — ask breeders for OFA certifications.
8. Tibetan Mastiff — The Himalayan Guardian
Size class: Giant | Male weight: 90–150 lb (41–68 kg) | Height: 26–29 inches (66–74 cm)
Key giant trait: Massive lion-like mane and extremely heavy bone structure. Males from working lines in Tibet and Nepal can exceed 150 lb, though Western show lines tend toward the lower end of the range.
Ranking rationale: Tibetan Mastiffs carry extraordinary bone density and a coat that adds 2–4 inches of apparent size. Their independent guardian nature and sheer presence make them one of the most imposing breeds alive.
Profile: This ancient livestock guardian is independent, strong-willed, and nocturnal by instinct (expect barking at night). They bond intensely with family but are aloof with strangers. Early socialization and consistent positive-reinforcement training are critical. Not recommended for first-time owners or apartment living. Annual coat blow is spectacular — invest in a high-velocity dryer ($100–$200).
9. Irish Wolfhound — The Tallest Sighthound
Size class: Giant (Tall) | Male weight: 120–155 lb (54–70 kg) | Height: 32–35 inches (81–89 cm)
Key giant trait: Second only to the Great Dane in shoulder height, but with a leaner, more athletic build. Males must be at least 32 inches per the AKC standard — taller minimums than most breeds.
Ranking rationale: Irish Wolfhounds are leggy and rangy rather than bulky, but their height and length give them enormous overall dimensions. A male standing 34 inches at the shoulder is common, placing them among the tallest breeds worldwide.
Profile: Despite their war-dog ancestry, modern Irish Wolfhounds are gentle, dignified, and somewhat reserved. They need daily galloping space (a securely fenced acre is ideal) but are calm indoors. Their rough coat requires hand-stripping or weekly brushing. Sadly, they have one of the shortest lifespans of any breed: 6–8 years on average, with dilated cardiomyopathy and osteosarcoma as leading causes of mortality.
10. Anatolian Shepherd — The Turkish Livestock Guardian
Size class: Giant | Male weight: 110–150 lb (50–68 kg) | Height: 29+ inches (74 cm)
Key giant trait: Tall, powerful, and athletic — built for endurance over rugged terrain while guarding flocks against wolves and bears.
Ranking rationale: Anatolian Shepherds combine above-average height with substantial lean mass. Their working heritage means they carry functional muscle rather than excess bulk, but their overall dimensions place them firmly in the giant category.
Profile: Independent, territorial, and intensely protective, Anatolian Shepherds are working guardians first and pets second. They need a job — ideally livestock to guard or a large property to patrol. According to the Merck Veterinary Manual, they mature slowly, not reaching full size until 3–4 years. Note: some jurisdictions have breed-specific legislation affecting Anatolian Shepherds — check local regulations before committing.
How These Giant Breeds Compare: Side-by-Side Data
| Breed | Male Weight (lb/kg) | Male Height (in/cm) | Lifespan | Exercise (min/day) | Annual Cost Estimate |
|---|---|---|---|---|---|
| English Mastiff | 160–230 lb / 73–104 kg | 30+ / 76+ | 6–10 years | 30–45 | $3,500–$5,000 |
| Saint Bernard | 140–180 lb / 64–82 kg | 28–30 / 71–76 | 8–10 years | 45–60 | $3,000–$4,500 |
| Boerboel | 150–200 lb / 68–91 kg | 24–27 / 61–69 | 9–11 years | 60–90 | $2,800–$4,200 |
| Neapolitan Mastiff | 150–165 lb / 68–75 kg | 26–31 / 66–79 | 7–9 years | 30–45 | $3,200–$4,800 |
| Great Dane | 140–175 lb / 64–79 kg | 30–32 / 76–81 | 7–10 years | 45–60 | $2,800–$4,500 |
| Leonberger | 120–170 lb / 54–77 kg | 28–31.5 / 71–80 | 8–10 years | 60–90 | $2,500–$4,000 |
| Newfoundland | 130–150 lb / 59–68 kg | 28 / 71 | 9–10 years | 45–60 | $2,800–$4,200 |
| Tibetan Mastiff | 90–150 lb / 41–68 kg | 26–29 / 66–74 | 10–12 years | 45–60 | $2,500–$3,800 |
| Irish Wolfhound | 120–155 lb / 54–70 kg | 32–35 / 81–89 | 6–8 years | 60–90 | $3,000–$5,500 |
| Anatolian Shepherd | 110–150 lb / 50–68 kg | 29+ / 74+ | 11–13 years | 60–90 | $2,200–$3,500 |
Decision Framework: Which Giant Breed Fits Your Life?
Choosing among the biggest dog breeds in the world comes down to matching the dog's needs to your actual lifestyle — not the fantasy version. Here's a practical decision framework based on the three breeds most commonly chosen by families:
- Do you have children under 10 and want a gentle family dog?
- Yes → Newfoundland or Great Dane. Both are exceptionally patient with children, trainable with positive reinforcement, and have moderate energy. Newfoundlands are sturdier for rough play; Great Danes are easier to groom.
- No, adults-only household → Continue to step 2.
- Do you want a low-energy companion (mostly walks and lounging)?
- Yes → English Mastiff or Neapolitan Mastiff. Both are calm, low-activity breeds that need space but not intense exercise. Budget for drool cleanup and skin-fold care.
- No, I want an active hiking/training partner → Continue to step 3.
- Do you have acreage or a working property?
- Yes → Anatolian Shepherd or Leonberger. Both thrive with a job — livestock guarding (Anatolian) or cart-pulling/water work (Leonberger). They need purpose, not just exercise.
- No, suburban home with fenced yard → Saint Bernard or Irish Wolfhound. Both adapt to suburban life with adequate daily walks and mental stimulation. Irish Wolfhounds need galloping space 2–3 times weekly.
- Is this your first dog?
- Yes → Strongly consider Great Dane or Newfoundland — both are forgiving of novice handler mistakes and respond well to positive-reinforcement training. Avoid Boerboels, Tibetan Mastiffs, and Anatolian Shepherds as first dogs.
- No, experienced owner → Any breed on this list is viable with proper research and commitment.
Honorable Mentions and Breeds That Almost Made the List
Several breeds came close but didn't quite meet our giant threshold:
- Bernese Mountain Dog (70–115 lb / 32–52 kg): A wonderful large breed, but males typically top out around 115 lb — below our 120+ lb giant threshold. Excellent alternative for families wanting a large but not super-giant dog.
- Dogue de Bordeaux (110–140 lb / 50–64 kg): Dense and muscular, but average weights fall just under the super-giant range. Worth considering if you want mastiff-type temperament in a slightly smaller package.
- Caucasian Shepherd (Ovcharka) (110–170 lb / 50–77 kg): Legitimately giant, but not recognized by the AKC (only FCI). Extremely independent and aggressive toward perceived threats — suitable only for experienced livestock guardian handlers.
- Cane Corso (99–110 lb / 45–50 kg): Athletic and powerful, but males average around 100–110 lb — large, not giant. They made our "almost" list for their imposing presence despite lower actual mass.
Breeds to avoid if you want a giant but aren't prepared: The Boerboel and Tibetan Mastiff are frequently surrendered to rescues by owners who underestimated their guardian instincts and training requirements. If you cannot commit to 18+ months of structured socialization and ongoing training with a professional behaviorist ($80–$150/session), choose a more tractable giant like a Great Dane or Newfoundland.
Health Considerations Unique to Giant Breeds
Before committing to any of the biggest dog breeds in the world, understand the health realities. Giant breeds face specific conditions that smaller dogs rarely encounter:
- Gastric Dilatation-Volvulus (GDV/Bloat): Deep-chested giants (Great Danes, Irish Wolfhounds, Saint Bernards) have a significantly elevated risk of bloat — a life-threatening stomach torsion requiring emergency surgery ($3,000–$7,000). Prophylactic gastropexy during spay/neuter reduces risk by approximately 90%.
- Hip and Elbow Dysplasia: Rapid growth in giant puppies stresses developing joints. Feed a large-breed puppy formula (26% protein or less, controlled calcium/phosphorus ratio) to slow growth rate. OFA hip and elbow screening for both parents is non-negotiable — ask breeders for certificates.
- Dilated Cardiomyopathy (DCM): Especially prevalent in Irish Wolfhounds (up to 25% of the breed) and Great Danes. Annual cardiac screening via echocardiogram ($200–$400) is recommended starting at age 2.
- Osteosarcoma: Bone cancer disproportionately affects giant breeds. Irish Wolfhounds and Great Danes carry elevated risk. Early detection through annual orthopedic exams improves treatment outcomes.
Emergency Red Flags for Giant Breeds:Seek immediate veterinary care if your giant-breed dog shows: unproductive retching or a distended abdomen (possible bloat — this is a minutes-matter emergency), sudden rear-leg weakness or dragging (possible spinal issue), or collapse after exercise (possible cardiac event). Call your nearest emergency veterinary hospital immediately — do not wait for regular office hours.
Frequently Asked Questions
What is the biggest dog breed in the world by weight?
The English Mastiff is the heaviest breed in the world, with males averaging 160–230 lb (73–104 kg). The heaviest dog ever recorded was an English Mastiff named Zorba, who weighed 343 lb (156 kg) in 1989. No other breed consistently produces individuals above 200 lb.
What is the biggest dog breed in the world by height?
The Great Dane holds the record for tallest breed. Males stand 30–32 inches at the shoulder minimum, with many reaching 34+ inches. The tallest living dog, Zeus, measured 41 inches at the shoulder. The Irish Wolfhound is a close second, with males standing 32–35 inches.
How much does a giant-breed puppy cost from a responsible breeder?
Expect to pay $1,500–$3,500 for a well-bred giant puppy from an AKC-registered breeder who performs OFA health clearances on both parents. Tibetan Mastiffs and Boerboels from working lines can cost $3,000–$5,000+. Always verify health testing through the OFA database (ofadatabase.org) before purchasing. Adoption from giant-breed rescues typically costs $300–$600.
Can giant breeds live in apartments?
Surprisingly, yes — with caveats. Great Danes and English Mastiffs are famously low-energy indoors and adapt to apartment living if given daily outdoor exercise. However, you'll need elevator access (carrying a 170-lb dog up stairs isn't practical), a landlord who permits large breeds, and nearby green space for walks. Irish Wolfhounds and Leonbergers need more space and are better suited to homes with yards.
What is the best food for giant-breed puppies?
Feed a commercial diet specifically labeled for "large breed puppy" or "giant breed puppy" growth. These formulas control calcium (1.0–1.5% dry matter) and phosphorus levels to prevent rapid bone growth that leads to dysplasia. Look for an AAFCO statement confirming the food is complete and balanced for large-breed growth. Brands like Purina Pro Plan Large Breed Puppy, Royal Canin Giant Puppy, and Hill's Science Diet Large Breed Puppy are commonly recommended by veterinary nutritionists. Budget $80–$150/month for food alone once the dog reaches adult size.
Why is the English Mastiff ranked #1 on this list?
The English Mastiff earns the top spot because no other breed matches its combination of minimum weight (160 lb per AKC standard), average weight (180–200 lb for well-conditioned males), and maximum recorded weight (343 lb). While Great Danes are taller and Boerboels may be more muscular pound-for-pound, the English Mastiff's sheer consistent mass makes it the biggest dog breed in the world by total body weight.
Are giant breeds good with children?
Most giant breeds — especially Newfoundlands, Great Danes, Saint Bernards, and Leonbergers — are excellent with children due to their patient, gentle temperaments. However, their size creates practical risks: a 150-lb dog can accidentally knock over a toddler by turning around. Always supervise interactions, teach children not to climb on the dog, and use positive-reinforcement training to teach the dog gentle behavior around small humans. Never use aversive training methods (shock collars, prong collars, alpha rolls) — these damage trust and can trigger defensive reactions.
Marcus Aldridge
All our authors care for dogs every day — read more of their work on the authors page.
