The Largest Dog Breed: 10 Giant Breeds Ranked by Size,...
Discover the largest dog breed rankings for 2026. We compare 10 giant breeds by weight, height, temperament, and cost to help you find your perfect giant companion.
If you have ever stood next to a Great Dane and felt like you were looking up at a small horse, you are not alone. The fascination with giant dogs is timeless, but determining the largest dog breed is more nuanced than most people realize. Weight, height, bone density, and overall mass all factor into the equation, and different breeds dominate different categories.
As someone who has worked with giant breed owners and veterinary teams for years, I can tell you that choosing a giant dog is one of the most consequential decisions a dog owner can make. These dogs eat more, cost more to treat medically, require specialized equipment, and have shorter lifespans than smaller breeds. This guide cuts through the hype with hard data, real costs, and a practical decision framework to help you determine which giant breed — if any — fits your life.
How We Ranked the Largest Dog Breeds
Selection Criteria
To qualify for this list, a breed must meet at least one of the following thresholds based on AKC breed standards and veterinary body condition data:
- Weight: Males averaging 100 lb (45 kg) or more at maturity
- Height: Males standing 27 inches (69 cm) or taller at the shoulder
- Overall mass: Breeds recognized by the AKC or FCI as a giant/working breed with documented average adult weights exceeding 90 lb (41 kg)
Breeds were ranked using a composite score that weighs average male weight (40%), average male height (30%), bone structure/mass (20%), and documented maximum recorded sizes (10%). Temperament, health, and lifestyle fit were evaluated separately in the decision framework below.
All weight and height figures represent mature adult males at 2–4 years of age, as most giant breeds do not reach full skeletal maturity until 18–36 months. Female measurements are typically 10–20% smaller.
The 10 Largest Dog Breeds Ranked
The following breeds are ordered by composite size ranking — a blend of weight, height, and overall mass. Each entry explains why it earned its position on this list.
1. English Mastiff — The Heaviest Dog Breed on Earth
Size class: Super-giant (heaviest breed by average mass)
Key trait: Unmatched sheer weight and bone density
Male weight: 160–230 lb (73–104 kg) | Height: 30+ inches (76+ cm)
Lifespan: 6–10 years
The English Mastiff claims the title of the largest dog breed by weight, and it is not even close. The heaviest recorded Mastiff, Aicama Zorba, weighed 343 lb (156 kg) in 1989. Modern males routinely exceed 200 lb (91 kg). Despite their imposing size, Mastiffs are famously gentle, low-energy dogs that prefer lounging to running. They drool — a lot — and require a home with space to accommodate their bulk, but they are not high-exercise dogs. Expect to spend $2,000–$3,500 for a puppy from a health-tested breeder and $3,500–$5,500 annually on food, joint supplements, and preventive care.
2. Great Dane — The Tallest Dog Breed
Size class: Super-giant (tallest breed by average height)
Key trait: Record-breaking height with a lean, athletic build
Male weight: 140–175 lb (64–79 kg) | Height: 30–34 inches (76–86 cm)
Lifespan: 7–10 years
If the Mastiff wins on weight, the Great Dane wins on height. Zeus, a Great Dane from Michigan, held the Guinness record at 44 inches (112 cm) at the shoulder before his passing. Danes are more athletic than Mastiffs and need 45–60 minutes of daily exercise. Their deep chests make them the breed most susceptible to gastric dilatation-volvulus (GDV/bloat), a life-threatening emergency. The AKC breed standard describes them as "spirited, courageous, always dependable." Puppy prices range from $1,500–$3,000. Annual care costs $3,000–$5,000.
3. Saint Bernard — The Alpine Giant
Size class: Giant
Key trait: Massive body with extraordinary cold-weather endurance
Male weight: 140–180 lb (64–82 kg) | Height: 28–30 inches (71–76 cm)
Lifespan: 8–10 years
Originally bred for alpine rescue by monks at the Great Saint Bernard Pass in Switzerland, these dogs carry dense bone and heavy muscle under a thick double coat. They are powerful yet patient, making them excellent family dogs for households with children. Saint Bernards are notorious shedders and droolers. Their size demands a home with ground-level access — stairs can accelerate joint degeneration in this breed. Puppy cost: $1,500–$2,500. Annual care: $3,000–$4,500.
4. Boerboel — The South African Powerhouse
Size class: Giant
Key trait: Exceptional muscle density and guarding instinct
Male weight: 150–200 lb (68–91 kg) | Height: 24–28 inches (61–71 cm)
Lifespan: 9–11 years
The Boerboel is a mastiff-type breed developed in South Africa to protect homesteads. What makes it rank so high is its extraordinary muscle-to-frame ratio — a Boerboel at 180 lb is significantly more muscular than a Great Dane at the same weight. This breed requires an experienced owner who understands positive reinforcement training and early socialization. Boerboels are not recommended for first-time owners. They are loyal and confident but can be territorial with unfamiliar dogs. Puppy cost: $1,500–$3,500. Annual care: $2,800–$4,200.
5. Leonberger — The Gentle Lion
Size class: Giant
Key trait: Tall frame with a lion-like mane and water-resistant coat
Male weight: 120–170 lb (54–77 kg) | Height: 28–31.5 inches (71–80 cm)
Lifespan: 7–9 years
Bred in Leonberg, Germany, in the 1840s by crossing Saint Bernards, Newfoundlands, and Great Pyrenees, the Leonberger is one of the tallest breeds on this list. Males sport a distinctive mane. They are known for versatility — equally comfortable hiking trails, swimming lakes, or napping on the couch. Leonbergers have a higher cancer rate than many breeds; the Leonberger Club of America recommends cardiac and hip evaluations for all breeding stock. Puppy cost: $1,800–$3,000. Annual care: $3,200–$4,800.
6. Neapolitan Mastiff — The Wrinkled Titan
Size class: Giant
Key trait: Extremely loose skin, massive head, and ancient guardian lineage
Male weight: 150–200 lb (68–91 kg) | Height: 26–31 inches (66–79 cm)
Lifespan: 7–9 years
Descended from war dogs of ancient Rome, the Neapolitan Mastiff is instantly recognizable by its heavy wrinkles, loose skin, and enormous head. Males can be wider across the chest than most breeds are tall. This breed is calm and low-energy indoors but requires confident handling. Their skin folds need regular cleaning to prevent dermatitis, and they are prone to cherry eye and hip dysplasia. Not ideal for apartments. Puppy cost: $2,500–$5,000. Annual care: $3,000–$5,000.
7. Newfoundland — The Water Rescue Giant
Size class: Giant
Key trait: Webbed feet, water-resistant coat, and legendary swimming ability
Male weight: 130–150 lb (59–68 kg) | Height: 28 inches (71 cm)
Lifespan: 9–10 years
Newfoundlands were bred to haul fishing nets and perform water rescues off the coast of Newfoundland, Canada. Their webbed feet and thick double coat make them powerful swimmers. Despite their bulk, "Newfies" are among the gentlest breeds in existence and are famously patient with children. They are prone to sub-aortic stenosis (a heart condition), cystinuria, and hip/elbow dysplasia. The Merck Veterinary Manual notes that sub-aortic stenosis is particularly prevalent in this breed. Puppy cost: $1,500–$2,500. Annual care: $3,000–$4,500.
8. Irish Wolfhound — The Tallest Sighthound
Size class: Giant (tallest of the sighthounds)
Key trait: Extraordinary height combined with speed and coursing instinct
Male weight: 120–155 lb (54–70 kg) | Height: 32–35 inches (81–89 cm)
Lifespan: 6–8 years
The Irish Wolfhound is technically the tallest breed on this list by minimum height standard — males must be at least 32 inches at the shoulder per the AKC. However, they are leaner than Mastiffs, which is why they rank lower on a composite mass score. Originally bred to hunt wolves and elk in Ireland, they retain a strong prey drive. They are gentle and dignified indoors but need a securely fenced yard (minimum 6 feet) and daily sprinting opportunities. Their short lifespan is the hardest trade-off. Puppy cost: $1,500–$2,500. Annual care: $3,000–$4,500.
9. Tibetan Mastiff — The Himalayan Guardian
Size class: Giant
Key trait: Extremely thick double coat and independent guardian temperament
Male weight: 90–150 lb (41–68 kg) | Height: 26–30 inches (66–76 cm)
Lifespan: 10–12 years
The Tibetan Mastiff has the longest lifespan of any breed on this list, which is remarkable for a dog of this size. Bred to guard monasteries and livestock in the Himalayas, they are independent, alert, and nocturnal — expect barking at night. Their coat is one of the thickest in the canine world, and they blow coat spectacularly once a year. They are not a breed for novice owners; early socialization is critical. Puppy cost: $2,000–$5,000+ (some imported lines exceed $8,000). Annual care: $2,500–$4,000.
10. Anatolian Shepherd — The Livestock Protector
Size class: Giant
Key trait: Endurance-built frame designed for 24/7 livestock guarding
Male weight: 110–150 lb (50–68 kg) | Height: 29+ inches (74+ cm)
Lifespan: 11–13 years
Rounding out the list is the Anatolian Shepherd, a Turkish livestock guardian breed with the longest lifespan of any giant breed. They are lean, athletic, and built for endurance rather than brute force. Anatolians are fiercely protective of their family and territory but not aggressive without cause. They require a job — whether that is actual livestock guarding or structured activities like scent work and long hikes. Not suited to apartment living. The AKC notes their strong independent streak. Puppy cost: $1,000–$2,500. Annual care: $2,200–$3,500.
Side-by-Side Comparison of the 10 Largest Dog Breeds
| Breed | Male Weight | Male Height | Lifespan | Exercise/Day | Annual Cost |
|---|---|---|---|---|---|
| English Mastiff | 160–230 lb / 73–104 kg | 30+ in / 76+ cm | 6–10 yr | 30 min | $3,500–$5,500 |
| Great Dane | 140–175 lb / 64–79 kg | 30–34 in / 76–86 cm | 7–10 yr | 45–60 min | $3,000–$5,000 |
| Saint Bernard | 140–180 lb / 64–82 kg | 28–30 in / 71–76 cm | 8–10 yr | 30–45 min | $3,000–$4,500 |
| Boerboel | 150–200 lb / 68–91 kg | 24–28 in / 61–71 cm | 9–11 yr | 60 min | $2,800–$4,200 |
| Leonberger | 120–170 lb / 54–77 kg | 28–31.5 in / 71–80 cm | 7–9 yr | 60 min | $3,200–$4,800 |
| Neapolitan Mastiff | 150–200 lb / 68–91 kg | 26–31 in / 66–79 cm | 7–9 yr | 30 min | $3,000–$5,000 |
| Newfoundland | 130–150 lb / 59–68 kg | 28 in / 71 cm | 9–10 yr | 45 min | $3,000–$4,500 |
| Irish Wolfhound | 120–155 lb / 54–70 kg | 32–35 in / 81–89 cm | 6–8 yr | 45–60 min | $3,000–$4,500 |
| Tibetan Mastiff | 90–150 lb / 41–68 kg | 26–30 in / 66–76 cm | 10–12 yr | 45 min | $2,500–$4,000 |
| Anatolian Shepherd | 110–150 lb / 50–68 kg | 29+ in / 74+ cm | 11–13 yr | 60+ min | $2,200–$3,500 |
Decision Framework: Which Giant Breed Fits Your Life?
Size alone should not drive your decision. Here is a practical framework to narrow down the top 3 choices based on your actual lifestyle.
Step 1: Define Your Living Situation
- Do you live in an apartment or condo? → Cross off Boerboel, Anatolian Shepherd, and Tibetan Mastiff. These breeds need land and will vocalize or become destructive without space. Consider the Great Dane (surprisingly good apartment dogs due to low indoor energy) or English Mastiff (couch potatoes).
- Do you have a fenced yard of at least 1/4 acre? → All breeds on this list are viable. Proceed to Step 2.
- Do you live on acreage or a working farm? → Anatolian Shepherd and Tibetan Mastiff thrive with a job and space to patrol.
Step 2: Assess Your Experience Level
- First-time dog owner? → Choose the Newfoundland, Great Dane, or Saint Bernard. These breeds are forgiving of training mistakes and eager to please. Avoid Boerboels, Neapolitan Mastiffs, and Tibetan Mastiffs.
- Experienced owner, but new to giants? → Leonberger and Irish Wolfhound are excellent intermediate choices — they respond well to positive reinforcement and have moderate handling difficulty.
- Seasoned giant breed handler? → Any breed on this list is viable. The Boerboel and Neapolitan Mastiff reward experienced owners with extraordinary loyalty.
Step 3: Consider Your Family
- Young children in the home? → Newfoundland and Saint Bernard are the safest choices. Their patience is legendary. Supervise all interactions — a 150 lb dog can accidentally knock over a toddler.
- Other dogs in the household? → Leonberger and Great Dane tend to be the most dog-social. Same-sex aggression can be an issue with Boerboels and Neapolitan Mastiffs.
- Cats or small animals? → Avoid Irish Wolfhound (high prey drive). Newfoundland and Saint Bernard are typically the best with small pets.
Step 4: Budget Reality Check
- Can you budget $5,000+/year for food, vet care, and supplies? → English Mastiff, Neapolitan Mastiff, or Leonberger are viable.
- Is your annual dog budget closer to $2,500–$3,500? → Anatolian Shepherd or Tibetan Mastiff have lower food costs (they eat less than you would expect) and fewer hereditary health issues.
- Have you considered pet insurance? For giant breeds, insurance is strongly recommended. Expect premiums of $80–$150/month for comprehensive coverage. Companies like Trupanion and Healthy Paws offer breed-specific plans.
Honorable Mentions and Breeds That Almost Made the List
Several breeds came close but fell just outside the selection thresholds or have important caveats:
- Dogue de Bordeaux (French Mastiff): Males average 110–145 lb (50–66 kg). Slightly below the weight threshold for the top 10 but an incredibly powerful breed. Notable for having one of the largest heads relative to body size of any breed. Lifespan of only 5–8 years.
- Great Pyrenees: Males average 100–160 lb (45–73 kg). Qualifies by weight but is lighter-boned and more moderately built than the breeds above. Excellent livestock guardians with a calm demeanor. A strong choice if you want a large white dog with a longer lifespan (10–12 years).
- Cane Corso: Males average 99–110 lb (45–50 kg). Just below the weight threshold. More athletic and agile than the mastiff breeds. Requires experienced handling. Note: Some municipalities have breed-specific legislation (BSL) affecting Cane Corsos — check your local regulations.
- Bernese Mountain Dog: Males average 80–115 lb (36–52 kg). Falls below the weight threshold but is a popular giant-adjacent breed. Known for a devastatingly short lifespan of 6–8 years due to high cancer rates.
Breeds to Approach with Caution
"Teacup" or "miniature" versions of giant breeds do not exist from reputable breeders. If someone advertises a "mini Mastiff" or "pocket Great Dane," walk away — these are typically runts bred to runts, carrying severe health problems.
Mixed breeds marketed as "designer giants" (e.g., Mastiff-Lab mixes, Danoodle) lack predictable size outcomes and health testing. You may end up with a 180 lb dog with the health issues of two breeds rather than hybrid vigor.
Health Considerations for Giant Breed Owners
Every giant breed shares certain health risks that you should understand before committing. Consult your veterinarian about a breed-specific wellness plan.
| Condition | Most Affected Breeds | Prevalence | Prevention |
|---|---|---|---|
| Hip/Elbow Dysplasia | All giant breeds, especially Mastiffs, Saint Bernards, Newfoundlands | 20–40% in predisposed breeds | OFA/PennHIP screening of parents; controlled growth-rate puppy food; avoid forced exercise before 18 months |
| Gastric Dilatation-Volvulus (Bloat) | Great Danes, Saint Bernards, Irish Wolfhounds | Up to 42% lifetime risk in Great Danes | Prophylactic gastropexy; elevated feeding; multiple small meals; no exercise 1 hour before/after eating |
| Dilated Cardiomyopathy (DCM) | Irish Wolfhounds, Newfoundlands, Great Danes | 10–25% in Wolfhounds | Annual cardiac screening; taurine supplementation if recommended by your vet; avoid grain-free diets without veterinary guidance |
| Osteosarcoma (Bone Cancer) | Irish Wolfhounds, Great Danes, Leonbergers | Leading cause of death in several giant breeds | No proven prevention; early detection via limping evaluation; amputation + chemo offers ~12 month median survival |
| Cruciate Ligament Tears | Newfoundlands, Mastiffs, Boerboels | 15–20% in predisposed breeds | Weight management; avoid sudden pivoting on hard surfaces; surgical repair typically $3,500–$6,000 per knee |
Feeding note: Giant breed puppies should be fed a food specifically formulated for large/giant breed growth. Look for an AAFCO statement that includes "growth" and meets the nutritional guidelines established by the WSAVA Global Nutrition Committee. Rapid growth in giant puppies increases dysplasia risk — these foods are formulated to slow growth rate while maintaining nutrition.
Frequently Asked Questions About the Largest Dog Breeds
What is the largest dog breed in the world?
By weight, the English Mastiff is the largest dog breed. By height, the Great Dane holds the record. The Irish Wolfhound has the tallest minimum breed standard, but individual Great Danes consistently surpass them. If you define "largest" by overall mass and volume, the Mastiff wins definitively.
Is the English Mastiff the largest dog breed by weight?
Yes. The English Mastiff is the heaviest dog breed by average adult male weight, with males typically ranging from 160–230 lb (73–104 kg). The heaviest Mastiff ever recorded weighed 343 lb (156 kg). No other breed comes close to the Mastiff's average weight.
What is the tallest dog breed?
The Great Dane is the tallest breed by recorded maximum height. The Irish Wolfhound has a taller minimum breed standard (32 inches for males vs. 30 inches for Danes), but individual Great Danes regularly exceed 34 inches, and the tallest recorded dog in history was a Great Dane named Zeus at 44 inches.
How much does it cost to own a giant breed dog?
Expect to spend $2,200–$5,500 per year on a giant breed, depending on the specific breed and your region. The biggest costs are food ($80–$200/month for premium giant breed formulas), veterinary care ($800–$2,000/year for routine care, significantly more for emergencies), and supplies (XL crates cost $150–$350; orthopedic beds $100–$300; harnesses $40–$80). First-year costs are typically 30–50% higher due to initial purchases and puppy vaccination series.
Are giant dog breeds good with children?
Many giant breeds — particularly Newfoundlands, Saint Bernards, and Great Danes — are excellent with children. Their temperament is typically calm and patient. The primary risk is accidental injury due to size: a 150 lb dog turning quickly can knock over a small child. Always supervise interactions, and teach children not to climb on or startle the dog.
How long do giant dog breeds live?
Giant breeds have the shortest lifespans in the canine world, averaging 6–12 years depending on the breed. The Anatolian Shepherd and Tibetan Mastiff are outliers, living 10–13 years. The Irish Wolfhound has one of the shortest at 6–8 years. Larger body size correlates with faster cellular aging in dogs — a phenomenon researchers at the University of Göttingen documented in a study of over 74,000 dogs across 74 breeds.
Can giant breeds live in apartments?
Some can, surprisingly. Great Danes and English Mastiffs are low-energy indoors and can adapt to apartment living if they receive adequate daily walks. However, breeds like the Anatolian Shepherd, Boerboel, and Tibetan Mastiff need land and a job — they are poor apartment candidates. Always check your lease for breed and weight restrictions before committing.
Should I get pet insurance for a giant breed?
Absolutely. Giant breeds are among the most expensive dogs to treat medically. A single bloat surgery can cost $5,000–$10,000. Hip replacement runs $5,000–$8,000 per hip. Cancer treatment can exceed $15,000. Comprehensive pet insurance premiums for giant breeds typically run $80–$150/month — a fraction of what a single emergency will cost out of pocket. Enroll while your dog is young and healthy; pre-existing conditions are not covered.
Anouk Beaumont
All our authors care for dogs every day — read more of their work on the authors page.
