How long does a Spanish Mastiff live?

The listed lifespan for a Spanish Mastiff is 10–12 years.

Is a Spanish Mastiff good with children?

The AKC good-with-children score for a Spanish Mastiff is 3 out of 5.

When is a Spanish Mastiff full grown?

The growth size band for a Spanish Mastiff is up to 24 months.

What is the energy level of a Spanish Mastiff?

The AKC energy score for a Spanish Mastiff is 3 out of 5.

Foundation Stock Service

Spanish Mastiff

Spanish Mastiff is a giant dog in the Foundation Stock Service. Adult weight is 140–200 lb, and the listed lifespan is 10–12 years. AKC describes the temperament as Intelligent, Affectionate, Kind.

Last reviewed November 1, 2026.

Spanish Mastiff dog — Photo: Canarian · CC BY-SA 3.0 · Wikimedia Commons

Lifespan10–12 years

Weight140–200 lb

SizeGiant

GroupFoundation Stock Service

Energy

3 / 5

Shedding

3 / 5

Grooming

1 / 5

Trainability

3 / 5

Good with kids

3 / 5

The breed record

Across 36 single-size giant breeds, a lifespan midpoint of 11 years is about 0.8 years longer than the 10.2-year average. A midpoint adult weight of 170 lb is about 54 lb heavier than the 116 lb average for those giant breeds.

The listed origin is Spain. The coat is described as double, smooth, short. The AKC energy score is 3 out of 5, 0.6 points below the group average of 3.6 for the Foundation Stock Service. Shedding scores 3 out of 5. Grooming scores 1 out of 5, so home brushing covers most weeks. Trainability scores 3 out of 5. Good with children scores 3 out of 5. Good with other dogs scores 3 out of 5.

Adult size is usually reached in up to 24 months (size-band statement (Salt et al. 2017): larger breeds require up to 24 months).

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