Dog breed
Jack Russell Terrier
From the United Kingdom and Australia, 10 to 12 inches at the shoulder and 11 to 13 pounds.
The fact file
- Where it comes from
- United Kingdom and Australia
- Height at the shoulder
- 10 to 12 inches
- Weight
- 11 to 13 pounds
- Size class
- Small, by the weight above
- Litter size
- around 4 puppies
- Named after
- John Russell
Most common names for a Jack Russell Terrier
In the pet license records we use, 1,442 dogs are listed as a Jack Russell Terrier or a Jack Russell Terrier mix. These are their most common names.
Names that lean Jack Russell Terrier
Each of these is more common among Jack Russell Terrier dogs than among all the dogs whose breed we can read in the records.
From pet license records published by New York City, Seattle, Cambridge in Massachusetts, and Allegheny County in Pennsylvania. How the names data works
A Jack Russell Terrier's life stages
A Jack Russell Terrier is a small dog by its recorded weight, and the age the senior years may start depends on size.
- PuppyBirth to 6 months
- Puppy or young adult6 to 9 months
- Young adult9 months to 3 years
- Young or mature adult3 to 4 years
- Mature adult4 to 12 years
- Mature adult or seniorFrom 12 years
Stages from the American Animal Hospital Association life stage guidelines. How the life-stage calculator works
A Jack Russell Terrier's age in human years
For a small dog, on the same method as our dog age calculator.
| Age | In human years |
|---|---|
| 1 year | 15 |
| 2 years | 24 |
| 3 years | 28 |
| 5 years | 36 |
| 7 years | 44 |
| 10 years | 56 |
| 13 years | 68 |
| 16 years | 80 |
Related breeds
The same size, or from the same country.
For your Jack Russell Terrier
Breed facts in the fact file: Wikidata, read 2026-10-03, which anyone may reuse.
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