The average life expectancy of a Jack Russell Terrier is 13 to 16 years old.
How Long Does A Jack Russell Live
Jack Russel Terrier puppies are some of the most popular breeds of dogs. They are loyal, intelligent, and friendly. Jack Russell Terriers are medium-sized dogs, weighing between 13 and 17 pounds and standing between 10 and 15 inches tall. The average lifespan of a Jack Russell Terrier is about 13 to 16 years.
Jack Russell Terriers are very loving, friendly, and smart. They are usually good with children. They are also known for their intelligence. This is one of the reasons that they are so popular.
Jack Russell Terriers are also very active dogs. They love to play. They are very playful and like to be around people. Jack Russell Terriers are known for being courageous. They are fearless and brave. They are also known to be stubborn.

FAQ
Why does Jack Russell live so long?
Jack Russel Terriers are more genetically predisposed to living longer than other breeds. They have a low resting metabolic rate, meaning they don’t require much energy to stay alive. The key to longevity in dogs is to provide a balanced diet with a healthy ratio of protein to carbohydrates.
How old is a Jack Russell in human years?
Jack Russels live 13 to 16 years which is 68 to 80 human years.
What is considered old for a Jack Russell?
11 years or more.
How old are Jack Russells when they stop growing?
12 months.
What is the longest a jack Russell has lived?
12.7 years.
When is jack Russell considered an adult?
At 12 months.
Which lives longer male or female Jack Russells?
Male Jack Russels live longer than females.
At what age do jack Russells slow down?
Jack Russels become senior at the age of 11 and they get slower.
When is Jack Russell considered a senior dog?
At 11 years or more.
Summary
Jack Russell Terriers are intelligent, energetic, and active dogs. They are the longest-living breed in the UK with a 13 to 16 years lifespan on average.