Special Report

The Biggest Dog Breeds in the US

Source: Salima Senyavskaya / iStock via Getty Images

2. Neapolitan Mastiff
> Weight: 150 pounds (male), 110 pounds (female)
> Height: 26-31 inches (male), 24-29 inches (female)
> Popularity: 100 out of 197
> Life expectancy: 7-9 years
> Personality: Loyal, Dignified, Watchful
> Group category: Working

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1. Mastiff
> Weight: 160-230 pounds (male), 120-170 pounds (female)
> Height: 30 inches & up (male), 27.5 inches & up (female)
> Popularity: 33 out of 197
> Life expectancy: 6-10 years
> Personality: Courageous, Dignified, Good-Natured
> Group category: Working

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