Bullmastiff breeds

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Sporting Group 33
Hound Group 33
Working Group 32
Terrier Group 32
Toy Group 22
Non-Sporting Group 20
Herding Group 33

#	Breed	AKC group	Size	Weight	Lifespan
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

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.