What's the Largest Dog Breed? 12 Giants Ranked by Size & Fit
What's the largest dog breed? We rank 12 giant breeds by height, weight, and lifestyle fit, with cost data, health risks, and a decision framework.
If you've ever stood next to a Great Dane and felt like you were looking up at a small horse, you've probably asked yourself: what's the largest dog breed? The answer isn't as simple as naming a single winner. "Largest" can mean tallest at the shoulder, heaviest on the scale, or most massive overall — and each distinction points to a different breed.
After years of helping families navigate giant-breed adoptions and working alongside veterinarians who treat these gentle giants daily, I've put together a comprehensive ranking that goes beyond raw measurements. Size matters, but so does temperament, health profile, living costs, and whether a 180-pound dog actually fits your lifestyle.
To qualify for this list, a breed must meet all three criteria:
- Minimum weight threshold: Adult males must average 100+ lb (45+ kg) per the AKC breed standard.
- Recognized breed status: Must be AKC-recognized or FCI-recognized with documented breed standards (no unstandardized mixes).
- Minimum height: Adult males must stand at least 25 inches (63.5 cm) at the shoulder.
We ranked entries using a composite of maximum typical weight, maximum typical height, and overall body mass index. Breeds are grouped into three tiers: Super Giants (150+ lb typical), Standard Giants (120–150 lb), and Entry-Level Giants (100–120 lb).
The 12 Largest Dog Breeds, Ranked
Tier 1: Super Giants (150+ lb / 68+ kg Typical)
1. English Mastiff
Size Class: Super Giant | Key Trait: Heaviest breed on record
The English Mastiff claims the crown for sheer mass. Males typically weigh 160–230 lb (73–104 kg) and stand 30+ inches at the shoulder. The AKC standard lists no upper weight limit. Zorba, an English Mastiff, held the Guinness record at 343 lb (155.6 kg). Despite their imposing size, Mastiffs are famously calm, often described as "couch potatoes" who need only 30–45 minutes of gentle daily exercise. Their lifespan averages 6–10 years — a sobering reality of giant-breed ownership.
Why it made the list: Heaviest typical weight of any standardized breed; unmatched body mass.
2. Saint Bernard
Size Class: Super Giant | Key Trait: Alpine rescue heritage, dense bone structure
Originally bred by monks at the Great Saint Bernard Hospice in the Swiss Alps for avalanche rescue, these dogs carry 140–180 lb (64–82 kg) on frames standing 28–30 inches tall. Their deep chests and powerful limbs were designed to break through snowdrifts. Modern Saint Bernards retain a gentle, patient temperament — they score well in family settings with children. Expect heavy drooling and significant shedding. Lifespan: 8–10 years.
Why it made the list: Combines extreme weight with functional working-dog mass; historically verified size records.
3. Boerboel
Size Class: Super Giant | Key Trait: Dense muscular build, South African farm guardian
The Boerboel ("farmer's dog" in Afrikaans) is a mastiff-type breed from South Africa, weighing 150–200 lb (68–91 kg) at 24–28 inches tall. Unlike some mastiff breeds that have become sedentary show dogs, the Boerboel retains athletic capability — they were bred to protect homesteads from leopards and baboons. They require experienced handlers and early socialization. AKC recognized the breed in 2015. Lifespan: 9–11 years.
Why it made the list: Exceptional muscle density gives them a heavier "feel" than height alone suggests; true working-dog mass.
4. Great Dane
Size Class: Super Giant | Key Trait: Tallest breed on record
If the Mastiff wins on weight, the Great Dane wins on height. Males stand 30–32+ inches (76–81+ cm) at the shoulder and weigh 140–175 lb (64–79 kg). Zeus, a Great Dane from Michigan, measured 44 inches (111.8 cm) at the shoulder — the tallest dog ever recorded. Despite their towering frame, Danes are known as "gentle giants" with moderate energy needs (45–60 minutes daily). Their deep chest makes them the breed most susceptible to gastric dilatation-volvulus (GDV/bloat). Lifespan: 7–10 years.
Why it made the list: Tallest standardized breed; holds every major height record in canine history.
Tier 2: Standard Giants (120–150 lb / 54–68 kg Typical)
5. Leonberger
Size Class: Standard Giant | Key Trait: Lion-like mane, versatile working ability
Bred in the 1840s in Leonberg, Germany, to resemble a lion, the Leonberger carries 120–170 lb (54–77 kg) on a 28–31.5 inch frame. Males sport a distinctive mane around the neck and chest. They're among the most versatile giants — equally capable in water rescue, cart-pulling, and therapy work. Their double coat requires 20+ minutes of brushing three times weekly. Lifespan: 7–9 years.
Why it made the list: Upper-range males rival Super Giants in weight; exceptional combination of height and substance.
6. Neapolitan Mastiff
Size Class: Standard Giant | Key Trait: Loose protective skin, ancient Roman lineage
Descended from war dogs of the Roman Empire, the Neapolitan Mastiff weighs 130–150+ lb (59–68+ kg) at 26–31 inches tall. Their signature loose, wrinkled skin was functional — it made it harder for attackers to grip vital areas. Modern Neos are calm guardians but require dedicated socialization to prevent overprotectiveness. They drool heavily and snore loudly. Lifespan: 7–9 years.
Why it made the list: Ancient breed with documented massive size spanning millennia; exceptional body density.
7. Newfoundland
Size Class: Standard Giant | Key Trait: Water rescue specialist, webbed feet
The Newfoundland weighs 130–150 lb (59–68 kg) at 28 inches tall, but their thick, water-resistant double coat and substantial bone make them appear even larger. Bred to haul fishing nets and rescue drowning sailors off the coast of Newfoundland, Canada, they have webbed feet and a natural swimming instinct. Their temperament is among the sweetest in the giant category — they're famously patient with children. Lifespan: 9–10 years.
Why it made the list: Combines heavy bone structure with functional mass; coat adds significant visual and actual bulk.
8. Tibetan Mastiff
Size Class: Standard Giant | Key Trait: Himalayan guardian, extreme cold adaptation
Weighing 90–150 lb (41–68 kg) at 26+ inches, the Tibetan Mastiff was bred to guard monasteries and livestock in the Himalayas at altitudes exceeding 16,000 feet. Their massive double coat can add 10–15 lb of fur alone. They're independent thinkers — not a breed for first-time owners. Notably, they typically have only one estrus cycle per year (most breeds have two). Lifespan: 10–12 years, making them one of the longest-lived giants.
Why it made the list: Upper-weight males are genuinely massive; unique among giants for combining size with above-average longevity.
Tier 3: Entry-Level Giants (100–120 lb / 45–54 kg Typical)
9. Irish Wolfhound
Size Class: Entry-Level Giant | Key Trait: Tallest sighthound, ancient Celtic war dog
The Irish Wolfhound stands 32–34+ inches (81–86+ cm) at the shoulder — rivaling the Great Dane in height — but carries a leaner 120–155 lb (54–70 kg) frame. Bred to hunt wolves and elk in ancient Ireland, they're the tallest of all sighthounds. Despite their athletic build, they're gentle and somewhat lazy indoors. Their rough coat needs weekly brushing. Lifespan: 6–8 years, unfortunately the shortest on this list.
Why it made the list: Second-tallest breed; historical records document their enormous size since at least 391 AD in Roman records.
10. Dogue de Bordeaux (French Mastiff)
Size Class: Entry-Level Giant | Key Trait: Massive head proportion, French guardian breed
The Dogue de Bordeaux weighs 110–145 lb (50–66 kg) at 23–27 inches. They have the largest head in proportion to body size of any breed — the head circumference can measure 27–30 inches. One of the oldest French breeds, they were used for hunting, guarding, and pulling carts. Their short, fawn coat is low-maintenance, but facial wrinkles require daily cleaning to prevent infection. Lifespan: 5–8 years.
Why it made the list: Exceptionally stocky build gives outsized mass relative to height; distinctive among mastiff types.
11. Anatolian Shepherd Dog
Size Class: Entry-Level Giant | Key Trait: Livestock guardian, exceptional endurance
Weighing 110–150 lb (50–68 kg) at 29+ inches, the Anatolian Shepherd is a Turkish livestock guardian breed with over 6,000 years of history. Unlike companion-oriented mastiffs, Anatolians are independent working dogs who patrol large territories. They're not recommended for suburban settings — they need acreage and a job. Their short-to-medium coat sheds heavily seasonally. Lifespan: 11–13 years, remarkably long for their size.
Why it made the list: Tall, heavy, and uniquely athletic among giants; longest lifespan in the giant category.
12. Cane Corso
Size Class: Entry-Level Giant | Key Trait: Italian mastiff, athletic guardian
The Cane Corso weighs 100–120 lb (45–54 kg) at 24–27.5 inches. Descended from Roman war dogs (the now-extinct Canis Pugnax), they're more athletic and agile than most mastiff breeds. They excel in protection sports, tracking, and agility. Early socialization and consistent positive-reinforcement training are non-negotiable — an unsocialized 110-pound guardian dog is a liability. Lifespan: 9–12 years.
Why it made the list: Upper-range males approach 130 lb; combines mastiff mass with working-dog athleticism.
Breed Comparison Table: All 12 Giants Side by Side
| Breed | Male Weight (lb/kg) | Male Height (in/cm) | Lifespan | Exercise Need | Family Fit |
|---|---|---|---|---|---|
| English Mastiff | 160–230 / 73–104 | 30+ / 76+ | 6–10 yr | 30–45 min | Excellent |
| Saint Bernard | 140–180 / 64–82 | 28–30 / 71–76 | 8–10 yr | 45–60 min | Excellent |
| Boerboel | 150–200 / 68–91 | 24–28 / 61–71 | 9–11 yr | 60+ min | Experienced Only |
| Great Dane | 140–175 / 64–79 | 30–32+ / 76–81+ | 7–10 yr | 45–60 min | Very Good |
| Leonberger | 120–170 / 54–77 | 28–31.5 / 71–80 | 7–9 yr | 60+ min | Very Good |
| Neapolitan Mastiff | 130–150+ / 59–68+ | 26–31 / 66–79 | 7–9 yr | 30–45 min | Experienced Only |
| Newfoundland | 130–150 / 59–68 | 28 / 71 | 9–10 yr | 45–60 min | Excellent |
| Tibetan Mastiff | 90–150 / 41–68 | 26+ / 66+ | 10–12 yr | 45–60 min | Experienced Only |
| Irish Wolfhound | 120–155 / 54–70 | 32–34+ / 81–86+ | 6–8 yr | 45–60 min | Very Good |
| Dogue de Bordeaux | 110–145 / 50–66 | 23–27 / 58–69 | 5–8 yr | 30–45 min | Good (with socialization) |
| Anatolian Shepherd | 110–150 / 50–68 | 29+ / 74+ | 11–13 yr | 60–90 min | Working Homes Only |
| Cane Corso | 100–120 / 45–54 | 24–27.5 / 61–70 | 9–12 yr | 60+ min | Experienced Only |
Health Risks Every Giant-Breed Owner Must Know
Owning one of the largest dog breeds comes with specific veterinary realities. According to the Merck Veterinary Manual, giant breeds face a distinct cluster of health challenges that smaller dogs rarely encounter:
- Gastric Dilatation-Volvulus (GDV/Bloat): The #1 emergency killer of giant breeds. The stomach fills with gas and can twist, cutting off blood supply. Great Danes have a lifetime GDV risk estimated at 37%. Prophylactic gastropexy (surgically tacking the stomach to the abdominal wall) costs $400–$1,200 and is recommended for all deep-chested giants during spay/neuter.
- Dilated Cardiomyopathy (DCM): Heart muscle disease prevalent in Great Danes, Irish Wolfhounds, and Newfoundlands. Annual cardiac screening via echocardiogram is recommended after age 3. Cost: $300–$600 per screening.
- Hip and Elbow Dysplasia: Malformation of joints leading to painful arthritis. OFA (Orthopedic Foundation for Animals) screening of breeding stock is essential. Treatment ranges from $1,500 (conservative management) to $6,000+ (total hip replacement per joint).
- Osteosarcoma: Bone cancer disproportionately affects giant breeds. Irish Wolfhounds, Great Danes, and Rottweilers carry elevated risk. Average treatment cost (amputation + chemotherapy): $8,000–$15,000.
- Cruciate Ligament Tears: The sheer weight puts enormous stress on knee joints. Surgical repair (TPLO or TTA) costs $3,000–$5,500 per knee.
- Unproductive retching or attempts to vomit without producing anything
- Distended, hard abdomen
- Sudden collapse or inability to stand
- Rapid, labored breathing at rest (more than 30 breaths/minute)
- Acute hind limb weakness or dragging
ASPCA Animal Poison Control: (888) 426-4435 (24/7, consultation fee applies) — call if your giant ingests a toxic substance. Giant breeds can consume large quantities quickly due to their size and reach.
The Real Cost of Owning the Largest Dog Breeds
Before falling in love with a 200-pound puppy, understand the financial commitment. Giant breeds cost significantly more than average dogs across every category:
| Expense Category | Average Dog | Giant Breed | Why It Costs More |
|---|---|---|---|
| Purchase Price | $500–$2,500 | $1,500–$5,000+ | Health testing, small litters (4–6 puppies vs. 8–12) |
| Annual Food | $300–$600 | $900–$2,000 | 6–10 cups/day of large-breed formula |
| Heartworm Prevention | $60–$120/yr | $150–$250/yr | Dosed by weight; highest tier for 100+ lb |
| Vet Visits (Annual) | $200–$400 | $500–$1,200 | Breed-specific cardiac/orthopedic screening |
| Emergency Surgery | $2,000–$5,000 | $5,000–$12,000 | More anesthesia, larger surgical supplies |
| Insurance (Annual) | $400–$700 | $800–$1,800 | Higher premiums for breed-specific risks |
First-year total for a giant breed: $4,500–$10,000+ (including purchase, supplies, food, vet care, and insurance). Budget for an emergency fund of $5,000–$10,000 or secure pet insurance that covers hereditary conditions before enrollment.
Decision Framework: Which Giant Breed Fits Your Life?
Choosing between the largest dog breeds shouldn't come down to size alone. Use this framework to narrow your top three:
- Do you live in an apartment or have limited space?
- → YES: Consider Great Dane or English Mastiff (surprisingly low indoor energy despite size)
- → NO, you have a yard: Continue to step 2
- Do you have children under 10?
- → YES: Prioritize Newfoundland, Saint Bernard, or English Mastiff (highest patience ratings)
- → NO or older children: Continue to step 3
- Is this your first dog?
- → YES: Choose Newfoundland, Great Dane, or Leonberger (most forgiving of training mistakes)
- → NO, you're experienced: Continue to step 4
- Do you want a working/guardian dog or a companion?
- → WORKING: Anatolian Shepherd, Boerboel, or Cane Corso
- → COMPANION: Irish Wolfhound, Saint Bernard, or Leonberger
- Is longevity a top priority?
- → YES: Anatolian Shepherd (11–13 yr) or Tibetan Mastiff (10–12 yr)
- → I accept shorter lifespan for maximum size: English Mastiff or Irish Wolfhound
Top 3 Head-to-Head: English Mastiff vs. Great Dane vs. Newfoundland
These three breeds consistently top the wish lists of prospective giant-breed owners. Here's how they compare across the factors that matter most in daily life:
| Factor | English Mastiff | Great Dane | Newfoundland |
|---|---|---|---|
| Drool Factor | Extreme — keep towels handy | Moderate | Moderate + water dripping from coat |
| Shedding | Moderate year-round | Low to moderate | Heavy, especially seasonal blows |
| Apartment Viability | Surprisingly good (very low energy) | Good if exercised daily | Poor (needs space + water access) |
| Training Ease | Moderate — can be stubborn | Good — eager to please | Excellent — highly biddable |
| GDV Risk | High | Very High (highest of any breed) | Moderate |
| Best For | Families wanting a calm, imposing companion | Active families wanting a tall, elegant gentle giant | Families near water who want an active, trainable giant |
Honorable Mentions & Breeds to Approach With Caution
Honorable Mentions (Just Below the Cutoff)
- Bernese Mountain Dog: Weighs 85–115 lb — just under the 100 lb male threshold for most lines. If they were slightly heavier, they'd make the list. Known for exceptional family temperament but heartbreaking lifespan of only 6–8 years due to high cancer rates.
- Bullmastiff: Males reach 110–130 lb at 25–27 inches. A strong candidate that narrowly missed the top 12 due to the depth of competition. Excellent family guardian.
- Scottish Deerhound: Similar to the Irish Wolfhound but slightly smaller (85–110 lb). Elegant and gentle but less commonly available.
Breeds to Approach With Caution (Common Misconceptions)
- "Teacup" or "Miniature" versions of giant breeds: These don't exist in legitimate breeding. Any breeder marketing a "mini Great Dane" or "teacup Mastiff" is either selling an unhealthy runt or running a scam.
- Unregistered "giant" mixed breeds: Some breeders cross two large breeds and market the result as a "giant designer dog" without health testing. Without OFA, cardiac, and genetic screening of both parents, you're gambling with expensive hereditary conditions.
- Caucasian Shepherd (Ovcharka): While genuinely massive (110–200+ lb), this breed is an intense livestock guardian with extreme territorial instincts. Not suitable for typical pet homes. Often subject to breed-specific legislation — check your local laws before considering.
Frequently Asked Questions About the Largest Dog Breeds
What's the largest dog breed ever recorded?
The heaviest dog ever recorded was Zorba, an English Mastiff who weighed 343 lb (155.6 kg) and measured 8 feet 3 inches from nose to tail in 1989. The tallest dog ever recorded was Zeus, a Great Dane from Otsego, Michigan, who stood 44 inches (111.8 cm) at the shoulder. Zeus passed away in 2014 at age 5. Both records are recognized by Guinness World Records.
Are the largest dog breeds good with children?
Many giant breeds — especially the English Mastiff, Newfoundland, Saint Bernard, and Leonberger — are known for exceptional patience with children. However, a 150-pound dog can accidentally knock over a toddler simply by turning around. Always supervise interactions, teach children to respect the dog's space, and never allow a child to ride or climb on any dog. The AVMA recommends structured introductions and positive reinforcement training for all dogs in households with children.
How much does the largest dog breed cost?
An English Mastiff puppy from a reputable breeder with OFA health testing typically costs $2,000–$4,500. Show-quality lines with champion pedigrees can reach $5,000–$8,000. Factor in $3,000–$5,000 in first-year supplies (XL crate: $200–$500, reinforced fencing: $1,500–$3,000, orthopedic bed: $150–$350) plus annual care costs of $2,500–$5,000.
Do giant breeds eat proportionally more than smaller dogs?
Yes, but not linearly. A 180-pound Mastiff eats roughly 8–12 cups of high-quality large-breed kibble daily (approximately 2,500–3,500 calories). That's about 3–4 times what a 40-pound dog eats, not 4.5 times. Giant breed puppies should be fed a specifically formulated large-breed puppy diet that limits calcium and calorie density to prevent rapid growth, which is linked to orthopedic disease. Never supplement a giant-breed puppy's diet with calcium without veterinary guidance.
Can giant breeds live in apartments?
Counterintuitively, some giant breeds adapt well to apartments. English Mastiffs and Great Danes are known for being relatively inactive indoors — they often prefer lying on a couch to running around. The key constraints are: elevator access (carrying an injured 160-pound dog down stairs is a real scenario), nearby green space for bathroom breaks, and landlord breed/weight restrictions. Always verify your lease allows dogs over 100 lb before committing.
Which giant breed has the longest lifespan?
Among the breeds on this list, the Anatolian Shepherd lives the longest at 11–13 years, followed by the Tibetan Mastiff at 10–12 years. This is significantly longer than the 6–8 year expectancy of the Irish Wolfhound or the 5–8 year expectancy of the Dogue de Bordeaux. Generally, within the giant category, leaner, more athletic breeds tend to outlive heavier, more massive breeds. Consult your veterinarian about breed-specific screening protocols to maximize your giant's healthspan.
Sources referenced: AKC Breed Standards, Merck Veterinary Manual, AVMA Dog Care Guidelines. Always consult your veterinarian for breed-specific health advice and before making decisions about giant-breed ownership.
Tom Renshaw
All our authors care for dogs every day — read more of their work on the authors page.
