TL;DR
The typical Jack Russell Terrier lifespan is about 13 to 15 years, among the longest of any breed. In a 2024 UK study of 584,734 dogs, Jack Russell Terriers had a median lifespan of 13.3 years, based on 13,497 deaths, and Parson Russell Terriers 13.8 years, against 12.0 years for mixed breeds. In UK life tables of 18 common breeds, the Jack Russell had the highest life expectancy at birth: 12.72 years. The best-known inherited risk is primary lens luxation, a painful, potentially blinding eye condition linked to a mutation in the ADAMTS17 gene that a DNA test can detect. A Jack Russell is a senior from about 10 years.
How long do Jack Russell Terriers live?
| Measure | Jack Russell Terrier | Mixed breed |
|---|---|---|
| Median lifespan, 2024 UK study (13,497 deaths) | 13.3 years | 12.0 years |
| Parson Russell Terrier, 2024 UK study (1,176 deaths) | 13.8 years | |
| Life expectancy at birth, UK life tables | 12.72 years (highest of 18 breeds) | 11.82 years |
| Senior from about (last 25% of lifespan) | 10 years | 9 years |
Jack Russell age in human years
| Dog's age | Life stage | Roughly like a person aged |
|---|---|---|
| 4 years | Mature adult | 24 |
| 5 years | Mature adult | 30 |
| 6 years | Mature adult | 36 |
| 7 years | Mature adult | 42 |
| 8 years | Mature adult | 48 |
| 9 years | Mature adult | 53 |
| 10 years | Senior | 59 |
| 11 years | Senior | 65 |
| 12 years | Senior | 71 |
| 13 years | Senior | 77 |
| 14 years | Senior, past the median | 83 |
| 15 years | Senior, past the median | 89 |
| 16 years | Senior, past the median | 95 |
This uses the share of the breed's typical lifespan a dog has lived, compared with US human life expectancy of 79 years. For puppies and young dogs, the DNA-based method in the calculator below is more accurate. Try any age:
Dog age calculator
Enter your dog's age and breed. Choose "Mixed breed" if you are not sure.
Human age (DNA method)
64
From age-related DNA changes in Labradors compared with people (Wang 2020). Least reliable for puppies under a few months.
Same point in a human life
53
Your dog has lived about 67% of the typical 12.0-year lifespan for this group. The same share of a 79.0-year US life expectancy is age 53.
Life stage
Mature adult
AAHA: from maturity until the last 25% of expected lifespan, about 9.0 years for this group.
Mixed breed (crossbreed): median lifespan 12.0 years (95% CI 12.0 to 12.1), senior from about 9.0 years.
Lifespans: UK study of 584,734 dogs (McMillan 2024). Life stages: AAHA. Every dog ages differently; health, weight and lifestyle all matter.
Health problems in Jack Russell Terriers
Primary lens luxation
In primary lens luxation, the fibers holding the lens of the eye in place weaken and break, so the lens slips out of position. It is painful and can cause glaucoma and blindness if not treated quickly. A mutation in the ADAMTS17 gene has been associated with the condition in Jack Russell Terriers, Miniature Bull Terriers and Lancashire Heelers, and a 2011 study found the same mutation in affected dogs of 14 more breeds, many of them terriers. Carriers with one copy also had a small increased risk.
Signs: a red, painful or cloudy eye, squinting, or a change in how the eye looks. Treat it as an emergency. Prevention: ask breeders for DNA test results.
Other things to watch
- Hypothyroidism is uncommon: in a UK study of 905,553 dogs, Jack Russells had 0.40 times the odds of crossbreeds, among the most protected breeds.
- Teeth: like other small dogs, Jack Russells benefit from daily dental care. See how to brush your dog's teeth.
- Injuries: an energetic, fearless terrier is prone to bumps, cuts and strains. See dog wound care.
Staying active into old age
Jack Russells stay lively well into their teens, but years of jumping and sprinting wear the joints. As your terrier ages, keep it lean, keep it moving with steady walks and sniffing games, and support the joints. In a 2006 trial, 67% of dogs with joint disease improved on green-lipped mussel extract by day 56, against 41% on placebo. Our green-lipped mussel powder is a single-ingredient topper. See senior dog exercise.
How to help a Jack Russell live longer
- Ask for an ADAMTS17 DNA test from the breeder, or test your dog.
- Treat any red or painful eye as an emergency.
- Daily dental care.
- Keep it lean and active, with lower-impact exercise as it ages.
- Twice-yearly vet checks from about 10 years.
FAQ
How long do Jack Russells live?
Most live about 13 to 15 years. A 2024 UK study found a median of 13.3 years for Jack Russell Terriers and 13.8 years for Parson Russell Terriers.
Are Jack Russells one of the longest-living breeds?
Yes. In UK life tables of 18 common breeds, the Jack Russell had the highest life expectancy at birth, 12.72 years.
Is 13 old for a Jack Russell?
A Jack Russell is a senior from about 10 years. At 13 it has lived about 98% of the breed's median lifespan, roughly like a person aged 77.
What is primary lens luxation in Jack Russells?
An inherited condition in which the lens of the eye slips out of place, causing pain and risking glaucoma and blindness. It is linked to a mutation in the ADAMTS17 gene, and a DNA test is available.
How can I help my Jack Russell live longer?
DNA-test for lens luxation, act fast on eye problems, keep it lean and active, look after its teeth, and book twice-yearly checks from about 10 years.
References
- McMillan KM, et al. Longevity of companion dog breeds: those at risk from early death. Scientific Reports. 2024. PMID: 38302530
- Teng KT, et al. Life tables of annual life expectancy and mortality for companion dogs in the United Kingdom. Scientific Reports. 2022. PMID: 35484374
- Gould D, et al. ADAMTS17 mutation associated with primary lens luxation is widespread among breeds. Veterinary Ophthalmology. 2011. PMID: 22050825
- O'Neill DG, et al. Frequency, breed predispositions and other demographic risk factors for diagnosis of hypothyroidism in dogs under primary veterinary care in the UK. Canine Medicine and Genetics. 2022. PMID: 36217196
- Pollard B, et al. Clinical efficacy and tolerance of an extract of green-lipped mussel in dogs presumptively diagnosed with degenerative joint disease. New Zealand Veterinary Journal. 2006. PMID: 16751841
For individual health questions, your veterinarian remains the best partner.
