Working Group

# Breed AKC group Size Weight Lifespan
8 RottweilerThe Rottweiler is a powerful German guardian and herding breed, black with rust markings, known for loyalty, confidence and a serious working nature. Working Group Large 80 to 135 lb 9 to 10 years
11 Cane CorsoThe Cane Corso is an Italian mastiff-type guardian with a muscular build and an alert, serious manner, suited to experienced owners. Working Group Large 90 to 120 lb 9 to 12 years
15 Doberman PinscherThe Doberman Pinscher is a sleek, fast German guard and working dog valued for intelligence, loyalty and a strong bond with its family. Working Group Large 60 to 100 lb 10 to 12 years
18 BoxerThe Boxer is a muscular, short-coated German working breed known for boundless energy, a playful streak and strong attachment to its family. Working Group Medium 50 to 70 lb 10 to 12 years
20 Bernese Mountain DogThe Bernese Mountain Dog is a large, tricolor Swiss farm dog known for a gentle, affectionate nature and a thick coat, with a short lifespan. Working Group Large 70 to 115 lb 7 to 10 years
22 Great DaneThe Great Dane is one of the tallest dog breeds, a gentle and dignified German giant with a short coat and a relatively short life. Working Group Large 110 to 175 lb 7 to 10 years
30 Siberian HuskyThe Siberian Husky is a medium-sized northern sled dog with a thick coat and striking eyes, known for endurance, independence and a love of running. Working Group Medium 35 to 60 lb 12 to 14 years
40 MastiffThe Mastiff is one of the heaviest dog breeds, a massive but gentle English guardian with a calm manner and a short, easy coat. Working Group Large 120 to 230 lb 6 to 10 years
43 Portuguese Water DogThe Portuguese Water Dog is an athletic, curly or wavy coated swimmer from Portugal, known for stamina, intelligence and a low-shedding coat. Working Group Medium 35 to 60 lb 11 to 13 years
46 NewfoundlandThe Newfoundland is a giant, water-loving working dog from Canada, famous for its sweet temperament, webbed feet and lifesaving swimming ability. Working Group Large 100 to 150 lb 9 to 10 years
52 Giant SchnauzerThe Giant Schnauzer is a powerful, bearded German working dog, strong and intelligent, that needs firm leadership, exercise and regular grooming. Working Group Large 55 to 85 lb 12 to 15 years
55 SamoyedThe Samoyed is a fluffy white northern herding and sled dog from Siberia, known for its smiling face, sociable nature and heavy coat. Working Group Medium 35 to 65 lb 12 to 14 years
62 AkitaThe Akita is a large, dignified spitz-type dog from Japan, loyal and strong-willed, with a thick coat and a reserved, guardian nature. Working Group Large 70 to 130 lb 10 to 13 years
63 Saint BernardThe Saint Bernard is a giant Swiss Alpine dog, calm and good-natured, famed for mountain rescue work and for a heavy build that drools and sheds. Working Group Large 120 to 180 lb 8 to 10 years
66 Great PyreneesThe Great Pyrenees is a large white livestock guardian from the Pyrenees mountains, gentle with its charges, independent in thought and a night-time barker. Working Group Large 85 to 115 lb 10 to 12 years
71 Greater Swiss Mountain DogThe Greater Swiss Mountain Dog is a strong, tricolor Swiss draft and farm dog, short-coated, willing and sociable, and larger than the Bernese. Working Group Large 85 to 140 lb 10 to 12 years
78 BullmastiffThe Bullmastiff is a large, short-coated English guardian, developed to deter poachers, now a calm and loyal companion with a firm but affectionate nature. Working Group Large 100 to 130 lb 7 to 9 years
81 Alaskan MalamuteThe Alaskan Malamute is a big, strong Arctic sled dog built for hauling heavy loads, with a thick coat, a friendly face and an independent mind. Working Group Large 75 to 85 lb 10 to 14 years
88 Anatolian Shepherd DogThe Anatolian Shepherd Dog is a large, rugged livestock guardian from Turkey, independent and protective, bred to defend flocks across open country. Working Group Large 80 to 150 lb 11 to 13 years
93 Standard SchnauzerThe Standard Schnauzer is a sturdy, bearded German farm dog of medium size, alert and spirited, with a wiry coat and a taste for work and company. Working Group Medium 30 to 50 lb 13 to 16 years
95 Dogue de BordeauxThe Dogue de Bordeaux is a massive French mastiff with a wrinkled face, a short red coat and a loyal, calm nature that comes with heavy drool. Working Group Large 99 to 140 lb 5 to 8 years
96 LeonbergerThe Leonberger is a giant, lion-maned German family dog with a water-resistant coat, a gentle disposition and a taste for company and swimming. Working Group Large 110 to 170 lb 7 to 9 years
101 Dogo ArgentinoThe Dogo Argentino is a powerful white Argentine big-game hunting dog, athletic and brave, needing experienced handling and firm socialization. Working Group Large 80 to 100 lb 10 to 15 years
112 BoerboelThe Boerboel is a massive South African mastiff-type farm guardian, strong, confident and protective, that needs knowledgeable owners and room. Working Group Large 110 to 200 lb 10 to 12 years
119 Neapolitan MastiffThe Neapolitan Mastiff is a giant, wrinkled Italian guardian with loose skin and heavy drool, calm at home and deeply watchful of its household. Working Group Large 110 to 150 lb 7 to 9 years
139 German PinscherThe German Pinscher is a medium-sized, short-coated German farm and guard dog, athletic and alert, with a lively, strong-willed and inquisitive nature. Working Group Medium 25 to 45 lb 12 to 14 years
142 Tibetan MastiffThe Tibetan Mastiff is a large, thickly coated guardian from the Himalayan region, aloof with strangers, independent and at its most active at night. Working Group Large 70 to 150 lb 10 to 14 years
154 Black Russian TerrierThe Black Russian Terrier is a large, black, shaggy-coated guardian developed in the Soviet Union, intelligent and loyal but demanding of owners and groomers. Working Group Large 80 to 130 lb 10 to 12 years
170 Danish-Swedish FarmdogThe Danish-Swedish Farmdog is a small, short-coated Scandinavian farm dog, cheerful and quick, valued as a ratter, watchdog and active family companion. Working Group Small 15 to 25 lb 11 to 13 years
179 KuvaszThe Kuvasz is a large white Hungarian livestock and property guardian, devoted to its family, wary of strangers and independent in judgment. Working Group Large 70 to 115 lb 9 to 12 years
185 KomondorThe Komondor is a large Hungarian flock guardian with a heavy white corded coat, calm and devoted at home, fearless against threats and demanding to groom. Working Group Large 80 to 100 lb 10 to 12 years
198 ChinookThe Chinook is a rare, tawny sled dog from New Hampshire, gentle, calm and willing, bred to combine the power of a freight dog with the speed of a racer. Working Group Large 55 to 90 lb 12 to 15 years

Ranked by the American Kennel Club's 2025 registration popularity. The three breeds it recognized in January 2026 follow. Weights are typical adult ranges; sizes are this site's classes: small under 25 lb, medium 25 to 60 lb, large over 60 lb.