World's Largest Dog Breeds Ranked: Size, Cost & Care Guide
Discover the world's largest dog breeds ranked by height and weight. Includes size comparisons, cost breakdowns, health risks, and a decision framework.
What Qualifies a Dog as One of the World's Largest Breeds?
When people search for the world largest dog breed, they're usually picturing a dog that makes a Great Dane look average. But "largest" can mean tallest at the shoulder, heaviest on the scale, or longest from nose to tail. For this ranking, I'm using a composite approach that mirrors how the American Kennel Club and Fédération Cynologique Internationale (FCI) categorize giant breeds.
- Minimum weight threshold: Breed standard must include males averaging 100 lb (45 kg) or more
- Minimum height threshold: Breed standard must include males averaging 26 inches (66 cm) or taller at the withers
- Recognized breed: Must hold full or miscellaneous recognition from AKC, UKC, or FCI
- Composite ranking: Breeds are ordered by a combined score of average male weight and average male height, weighted 50/50
This approach captures both the towering sighthounds and the barrel-chested mastiff types. A 180-lb English Mastiff that stands 30 inches tall scores differently than a 140-lb Irish Wolfhound standing 34 inches — and both deserve a spot. I've drawn weight and height data from the AKC breed standards, the Merck Veterinary Manual, and the UKC registry. Where breed standards give ranges, I use the midpoint for ranking.
A note before we start: giant breeds carry unique ownership challenges. Veterinary care costs 30–60% more than for medium breeds simply because drug dosages scale with body weight. Emergency surgery on a 170-lb dog can exceed $8,000 where the same procedure on a 40-lb dog might cost $3,500. If you're researching these breeds, budget planning is just as important as choosing the right temperament.
The World's Largest Dog Breeds: Ranked
The following 12 breeds represent the verified giants of the canine world. Each entry includes the data points that earned its ranking position, along with practical ownership context you won't find in a standard breed encyclopedia.
1. English Mastiff
Size Class: Super Giant | Average Male Weight: 160–230 lb (73–104 kg) | Average Male Height: 30+ in (76+ cm)
Key Trait: Heaviest breed on record — an English Mastiff named Zorba weighed 343 lb (155.6 kg) in 1989, a Guinness World Record that still stands.
Profile: The English Mastiff is the undisputed heavyweight champion. Despite their imposing mass, they're famously low-energy indoors — think of a very large, very affectionate rug. They drool heavily, require joint supplementation from puppyhood, and have a shorter lifespan of 6–10 years. Expect to spend $200–$350/month on food alone for a full-grown male.
2. Boerboel
Size Class: Super Giant | Average Male Weight: 150–200 lb (68–91 kg) | Average Male Height: 24–27 in (61–69 cm)
Key Trait: South African farm guardian with the highest muscle-to-height ratio among mastiff breeds — compact but extraordinarily dense.
Profile: The Boerboel was developed to protect homesteads from lions and leopards. They're confident, territorial, and not a breed for first-time owners. Early socialization is non-negotiable: a poorly socialized 180-lb guardian dog is a liability risk. AKC recognized the breed in 2015, and reputable breeders typically charge $2,500–$5,000 for a health-tested puppy.
3. Saint Bernard
Size Class: Super Giant | Average Male Weight: 140–180 lb (64–82 kg) | Average Male Height: 28–30 in (71–76 cm)
Key Trait: Heaviest of the Alpine working breeds, originally tasked with locating and rescuing avalanche victims at the Great St. Bernard Hospice in Switzerland.
Profile: Saint Bernards combine genuine mass with surprising agility for their size. They're gentle with children and other dogs but have a stubborn streak that makes recall training a long-term project. The breed is predisposed to hip and elbow dysplasia — OFA screening of both parents is essential before purchase. Lifespan averages 8–10 years.
4. Great Dane
Size Class: Giant (Tall) | Average Male Weight: 140–175 lb (64–79 kg) | Average Male Height: 30–32 in (76–81 cm)
Key Trait: Tallest mainstream breed — a Great Dane named Zeus measured 44 inches (111.8 cm) at the withers, the tallest dog ever recorded by Guinness.
Profile: Often called the "Apollo of dogs," Great Danes are tallest rather than heaviest. They're famously affectionate and clumsy in small spaces. Gastric dilatation-volvulus (bloat) is the breed's most dangerous health risk — prophylactic gastropexy during spay/neuter is strongly recommended and costs $300–$600 when performed alongside another procedure. Daily food cost for an adult male: $5–$9 on a quality large-breed kibble.
5. Neapolitan Mastiff
Size Class: Giant | Average Male Weight: 150 lb (68 kg) | Average Male Height: 26–31 in (66–79 cm)
Key Trait: Most extreme loose skin and wrinkle structure of any breed — a trait originally selected for protection against bites reaching vital tissue.
Profile: Descended from Roman war dogs, the Neo is a serious guardian with a calm, watchful demeanor at home. Their wrinkles require daily cleaning to prevent bacterial and yeast infections (intertrigo). Drool management is a full-time job — most owners keep drool towels in every room. Not recommended for apartments or households with frequent visitors.
6. Leonberger
Size Class: Giant | Average Male Weight: 120–170 lb (54–77 kg) | Average Male Height: 28–31.5 in (71–80 cm)
Key Trait: One of the few giant breeds with a documented water rescue heritage — Leonbergers have webbed feet and a natural swimming drive.
Profile: Bred in the German town of Leonberg to resemble a lion, this breed combines mastiff mass with retriever-like sociability. They excel in water work, cart pulling, and therapy dog roles. Leonbergers are predisposed to polyneuropathy (LPN) and laryngeal paralysis — responsible breeders run DNA tests for LPN1 and LPN2. Puppy price from an OFA-tested breeder: $2,000–$3,500.
7. Newfoundland
Size Class: Giant | Average Male Weight: 130–150 lb (59–68 kg) | Average Male Height: 28 in (71 cm)
Key Trait: Highest documented water rescue instinct of any breed — Newfoundlands have been recorded swimming 2+ miles to assist drowning swimmers.
Profile: The "Newf" is among the gentlest giants in the dog world, consistently scoring well on temperament tests with children and strangers. Their thick double coat requires brushing 3–4 times per week and professional grooming every 8–10 weeks ($80–$120 per session for a dog this size). Subaortic stenosis (SAS), a heart condition, affects the breed at higher rates — cardiac screening by a veterinary cardiologist is a must before breeding or purchase.
8. Anatolian Shepherd
Size Class: Giant | Average Male Weight: 110–150 lb (50–68 kg) | Average Male Height: 29+ in (74+ cm)
Key Trait: Livestock guardian with the highest independent decision-making drive among giant breeds — bred to patrol without human direction for days.
Profile: Also known as the Kangal in some registries, the Anatolian Shepherd is not a companion breed in the traditional sense. They bond deeply with their family or flock but are aloof with strangers and can be aggressive toward unfamiliar dogs. They need acreage, not apartments. Their lifespan of 11–13 years is notably long for a giant breed, likely due to the hybrid vigor of their landrace origins in Turkey.
9. Tibetan Mastiff
Size Class: Giant | Average Male Weight: 90–150 lb (41–68 kg) | Average Male Height: 26+ in (66+ cm)
Key Trait: Only breed on this list with a single annual estrus cycle (most dogs cycle twice yearly) — a trait shared with wolves and reflecting primitive genetics.
Profile: The Tibetan Mastiff's lion-like mane and independent temperament make them striking but challenging. They're nocturnal by instinct — expect barking at night if they have outdoor access. During the 2010s, speculative breeding in China inflated prices to over $1 million for "red" specimens; the market collapsed, and today US-bred puppies from health-tested parents run $2,500–$4,000. Hip dysplasia and hypothyroidism are the primary health concerns.
10. Irish Wolfhound
Size Class: Giant (Tall) | Average Male Weight: 120 lb (54 kg) | Average Male Height: 32+ in (81+ cm)
Key Trait: Tallest sighthound and historically used to hunt wolves and elk — the breed standard calls for "great size, including height at shoulder and proportionate length of body."
Profile: Despite their wolf-hunting heritage, Irish Wolfhounds are famously gentle and sensitive. They're the quietest breed on this list — rarely barking without cause. Their lifespan of 6–8 years is the shortest among the breeds listed here, with osteosarcoma (bone cancer) and dilated cardiomyopathy (DCM) as leading causes of death. Prospective owners should budget for cardiac screening ($250–$400 annually) beginning at age 2.
11. Cane Corso
Size Class: Large-Giant | Average Male Weight: 100–120 lb (45–54 kg) | Average Male Height: 25–27.5 in (64–70 cm)
Key Trait: Most athletic of the mastiff breeds — capable of sprinting 25+ mph and excelling in protection sports, agility, and dock diving.
Profile: The Cane Corso is an Italian mastiff with drive and intelligence that sets it apart from more sedentary giants. They need 60–90 minutes of structured exercise daily and benefit from job-oriented activities. Positive reinforcement training works exceptionally well; aversive methods backfire with this breed due to their sensitivity beneath the tough exterior. Note: Some jurisdictions include the Cane Corso under breed-specific legislation — check your local ordinances before committing.
12. Dogue de Bordeaux
Size Class: Large-Giant | Average Male Weight: 110–140 lb (50–64 kg) | Average Male Height: 23.5–27 in (60–69 cm)
Key Trait: Largest head circumference relative to body size of any breed — the skull measurement is a key breed standard criterion.
Profile: The French Mastiff is stocky, powerful, and deeply loyal to family. They tend to bond intensely with one person and can be reserved with strangers. Brachycephalic features mean heat intolerance is a serious concern — never exercise a Dogue de Bordeaux in temperatures above 80°F (27°C). Their average lifespan of 5–8 years reflects the cardiac and respiratory challenges common to brachycephalic giant breeds.
Giant Breed Comparison: All 12 Breeds at a Glance
| Breed | Male Weight (lb/kg) | Male Height (in/cm) | Lifespan | Exercise Needs | Family Fit |
|---|---|---|---|---|---|
| English Mastiff | 160–230 / 73–104 | 30+ / 76+ | 6–10 yr | Low (20–30 min) | ★★★★★ |
| Boerboel | 150–200 / 68–91 | 24–27 / 61–69 | 9–11 yr | Moderate (45 min) | ★★★☆☆ |
| Saint Bernard | 140–180 / 64–82 | 28–30 / 71–76 | 8–10 yr | Moderate (40 min) | ★★★★★ |
| Great Dane | 140–175 / 64–79 | 30–32 / 76–81 | 7–10 yr | Moderate (45 min) | ★★★★☆ |
| Neapolitan Mastiff | 150 / 68 | 26–31 / 66–79 | 7–9 yr | Low (20 min) | ★★★☆☆ |
| Leonberger | 120–170 / 54–77 | 28–31.5 / 71–80 | 7–9 yr | High (60+ min) | ★★★★★ |
| Newfoundland | 130–150 / 59–68 | 28 / 71 | 9–10 yr | Moderate (40 min) | ★★★★★ |
| Anatolian Shepherd | 110–150 / 50–68 | 29+ / 74+ | 11–13 yr | High (60+ min) | ★★☆☆☆ |
| Tibetan Mastiff | 90–150 / 41–68 | 26+ / 66+ | 10–12 yr | Moderate (45 min) | ★★★☆☆ |
| Irish Wolfhound | 120 / 54 | 32+ / 81+ | 6–8 yr | Moderate (40 min) | ★★★★☆ |
| Cane Corso | 100–120 / 45–54 | 25–27.5 / 64–70 | 9–12 yr | High (60–90 min) | ★★★★☆ |
| Dogue de Bordeaux | 110–140 / 50–64 | 23.5–27 / 60–69 | 5–8 yr | Low-Moderate (30 min) | ★★★★☆ |
Ranking Rationale: Why Each Breed Earned Its Spot
Ranking giant breeds requires balancing height and weight, since a breed that is tall but light (Irish Wolfhound) and a breed that is shorter but extremely heavy (English Mastiff) both qualify as "largest" depending on the metric. Here's how the top positions break down:
English Mastiff (#1): When you combine average mass (midpoint ~195 lb / 88 kg) with height (30+ inches), no other breed matches the composite score. The Mastiff's weight ceiling is simply unmatched — healthy males routinely exceed 200 lb, and the breed holds the all-time weight record.
Boerboel (#2): Slightly shorter than the Mastiff but denser per inch of height. A 180-lb Boerboel standing 26 inches is carrying more muscle mass per frame than most breeds on this list. Their compact build means they don't rank as tall, but their weight range pushes them firmly into super-giant territory.
Saint Bernard (#3): A balanced giant — heavy enough to rival the Mastiff in some bloodlines and tall enough to approach Great Dane height. The breed's well-documented history of alpine rescue adds functional credibility to their size.
Great Dane (#4): If this list ranked by height alone, the Dane would be #1. However, their leaner build (average midpoint ~157 lb) places them below the heavier mastiff types in a composite ranking. They're the tallest breed most people will ever encounter in daily life.
Neapolitan Mastiff (#5): Comparable weight to the Saint Bernard but with greater height variance. Their loose skin and heavy bone structure add to overall mass without necessarily reflecting in height measurements.
Leonberger (#6): The widest weight range on the list (120–170 lb) means some individuals rival the top five while others fall closer to a Newfoundland. Their athletic build and height push them solidly into the top tier.
Newfoundland (#7): Consistent in both weight and height, the Newf is a reliable giant without the extreme outliers seen in Mastiffs or Danes. Their working heritage in water rescue makes their size functionally purposeful.
Positions 8–12: The Anatolian Shepherd, Tibetan Mastiff, Irish Wolfhound, Cane Corso, and Dogue de Bordeaux each bring at least one dimension (height, weight, or functional mass) that meets our threshold, but they rank lower because their composite scores fall below the top seven.
Honorable Mentions and Breeds to Avoid for Size-Seeking Owners
Honorable Mentions
- Bernese Mountain Dog: Males reach 85–115 lb (39–52 kg) and 25–27.5 inches — just below our 100-lb average threshold for some bloodlines. Exceptional family dogs with a heartbreaking lifespan of only 6–8 years.
- Scottish Deerhound: Similar to the Irish Wolfhound but slightly smaller at 85–110 lb. Elegant sighthound with a calm temperament.
- Bullmastiff: 110–130 lb but only 25–27 inches tall. They're heavy but don't quite reach the height threshold to rank on this list.
- Caucasian Shepherd (Ovcharka): Can exceed 170 lb and 30 inches, but lacks AKC recognition (FCI-recognized only), and their extreme guardian drive makes them unsuitable for most pet homes.
Breeds to Avoid If You Want a Manageable Giant
- Presa Canario: Powerful, territorial, and not recommended for households without experienced guardian-breed handling. Their bite force and prey drive require professional training support from puppyhood.
- Tosa Inu: Banned or restricted in at least 15 countries. Males can reach 130–200 lb. Historically bred for dog fighting — while modern Tosas can be gentle, the breed requires expert handling and may not be insurable under standard homeowner policies.
- Caucasian Shepherd: As mentioned above, this livestock guardian is not a pet breed. They will challenge unfamiliar humans and dogs without hesitation, and their size makes any behavioral issue a serious safety concern.
Decision Framework: Choosing Between the Top 3 Giants
If you've narrowed your search to the English Mastiff, Boerboel, or Saint Bernard, here's a practical framework based on the lifestyle factors that matter most with giant breeds:
- First-time owner → English Mastiff or Saint Bernard. Both are forgiving of training mistakes and naturally low-aggression.
- Experienced owner (previous guardian breeds) → Boerboel is viable if you're prepared for structured training and socialization.
Step 2: Evaluate your living space
- House with fenced yard → All three work, but Boerboels need secure 6-foot fencing (they can scale 4-foot fences).
- Apartment or condo → English Mastiff is the only realistic option. They're essentially sedentary indoors and don't need a yard if you commit to two 15-minute walks daily.
- Rural property with acreage → Saint Bernard or Boerboel thrive with space to patrol.
Step 3: Consider your household composition
- Children under 10 → English Mastiff or Saint Bernard. Both are patient and slow-moving. A 180-lb Boerboel playing excitedly can accidentally knock over a small child.
- Other dogs in the home → Saint Bernards and Mastiffs integrate well with existing dogs. Boerboels can be same-sex aggressive, particularly males with other intact males.
- Frequent guests or entertaining → English Mastiff. They greet strangers with indifference or gentle curiosity. Boerboels and Neapolitan Mastiffs will assess every visitor as a potential threat.
Step 4: Budget honestly
- Annual veterinary cost (giant breed): $1,200–$2,500 for routine care; $5,000–$12,000 for a single emergency surgery
- Monthly food cost: $150–$350 depending on brand and the dog's actual weight
- Pet insurance premium (giant breed): $80–$180/month depending on coverage, deductible, and the dog's age at enrollment
- Lifetime cost estimate: $15,000–$35,000 over 7–10 years including purchase price, food, veterinary care, grooming, and insurance
Health Risks All Giant-Breed Owners Must Know
Giant breeds share a cluster of health risks driven by their rapid growth and the mechanical stress of carrying extreme body mass. Consult your veterinarian about a breed-specific wellness plan before bringing any giant breed home.
| Condition | Breeds Most Affected | Prevalence | Prevention |
|---|---|---|---|
| Gastric Dilatation-Volvulus (Bloat) | Great Dane, Saint Bernard, Mastiff | Up to 40% lifetime risk in Danes | Prophylactic gastropexy; slow-feed bowls; no exercise 1 hr after meals |
| Hip Dysplasia | All breeds on this list | 15–50% depending on breed | OFA/PennHIP screening of parents; controlled growth rate in puppies |
| Dilated Cardiomyopathy (DCM) | Irish Wolfhound, Newfoundland, Great Dane | 10–25% in Wolfhounds | Annual cardiac screening from age 2; taurine-supplemented diet |
| Osteosarcoma | Irish Wolfhound, Great Dane, Rottweiler | ~25% of Wolfhound deaths | No proven prevention; early detection via limb pain monitoring |
| Elbow Dysplasia | Newfoundland, Leonberger, Saint Bernard | 10–20% in Newfoundlands | OFA elbow screening; avoid high-impact exercise before 18 months |
For detailed information on any of these conditions, the Merck Veterinary Manual Dog Owner's section provides thorough, veterinarian-reviewed explanations. Always discuss screening protocols with your vet — early detection significantly improves outcomes for most of these conditions.
Frequently Asked Questions About Giant Dog Breeds
What is the single largest dog breed in the world?
By combined weight and height, the English Mastiff is the world's largest dog breed. Males average 160–230 lb (73–104 kg) and stand 30+ inches at the shoulder. If measuring by height alone, the Great Dane holds the record — a Dane named Zeus measured 44 inches at the withers.
How much does it cost to own a giant breed dog?
Budget $15,000–$35,000 over the dog's lifetime (typically 6–12 years depending on breed). This includes the purchase price ($1,500–$5,000 from a responsible breeder), annual veterinary care ($1,200–$2,500), monthly food ($150–$350), pet insurance ($80–$180/month), grooming, and supplies. Emergency veterinary care can add $5,000–$12,000 for a single event like bloat surgery.
Are giant dog breeds good with children?
English Mastiffs, Saint Bernards, Newfoundlands, and Leonbergers are consistently rated as excellent family dogs with children. Their calm temperament and low prey drive make them patient companions. However, any dog weighing 150+ lb can accidentally injure a toddler through normal play — supervision is always required, and children should be taught to respect the dog's space.
Do giant breeds need a large yard?
Not necessarily. English Mastiffs and Dogue de Bordeaux are surprisingly well-suited to apartment living because they're low-energy indoors. The exercise requirement is more about structured daily activity (walks, training sessions) than yard access. That said, breeds like the Anatolian Shepherd and Leonberger genuinely need space to move and are not well-suited to confined living.
What is the longest-living giant breed?
The Anatolian Shepherd lives 11–13 years on average — exceptionally long for a breed exceeding 100 lb. The Cane Corso (9–12 years) and Tibetan Mastiff (10–12 years) also outlive most giant breeds. Conversely, the Irish Wolfhound (6–8 years) and Dogue de Bordeaux (5–8 years) have the shortest lifespans among the breeds on this list.
Should I feed a giant breed puppy a special diet?
Yes. Giant breed puppies must grow slowly to reduce the risk of developmental orthopedic diseases like hip dysplasia and hypertrophic osteodystrophy. Feed a diet specifically formulated for large/giant breed puppies — these contain controlled calcium (1.0–1.8% on a dry matter basis) and moderate caloric density. The AKC recommends keeping giant breed puppies on a large-breed puppy formula until 18–24 months of age, not 12 months as with smaller breeds.
Aaron Whyte
All our authors care for dogs every day — read more of their work on the authors page.
