The 2026 Dog Data Report.
We analysed the numbers behind our library of 124 dog breed profiles to answer a few questions people actually ask: how long do dogs really live, does size change that, and which breeds are most popular. Here is what the data says, with the method laid out so you can check it.
Bigger dogs live shorter lives
It is one of the clearest patterns in dog biology, and our data shows it plainly: average lifespan falls steadily as breed size rises. Toy and small breeds average 13.9 years, while giant breeds average just 9.1 - a gap of about 4.8 years across the size range.
Average of the midpoint of each breed's published lifespan range, grouped by adult weight.
How the breeds break down by size
Our library skews toward larger dogs, which reflects how many popular working and family breeds sit in the large group.
Longest- and shortest-lived breeds
The spread is wide: our longest-lived breeds outlast the shortest-lived by roughly 9 years on average. Small dogs dominate the top; giant breeds fill the bottom.
Longest-lived
- Xoloitzcuintli15.5 yrs
- Havanese15 yrs
- Belgian Malinois15 yrs
- Chihuahua15 yrs
- Papillon15 yrs
- Poodle (Standard, Miniature, Toy)14.5 yrs
Shortest-lived
- Dogue de Bordeaux6.5 yrs
- Irish Wolfhound7 yrs
- Bullmastiff8 yrs
- English Mastiff8 yrs
- Leonberger8.5 yrs
- Great Dane8.5 yrs
Ranked by the midpoint of each breed's published lifespan range.
The most popular breeds
Popularity here follows the American Kennel Club's ranking of the most popular dog breeds of 2025, so it reflects registrations in the United States. It is an ordinal ranking - the AKC reports the order, not exact numbers.
- French Bulldog
- Labrador Retriever
- Golden Retriever
- German Shepherd
- Dachshund
- Poodle
- Beagle
- Rottweiler
- German Shorthaired Pointer
- Bulldog
Key takeaways
- Across the 100 breeds with a published lifespan range, the average dog lives about 12.2 years.
- Size is the single biggest lever on lifespan: toy and small breeds average 13.9 years, giants around 9.1.
- If a long companionship matters most to you, the odds favour a smaller breed - but every size has wonderful dogs.
- Popularity and lifespan are unrelated: several top-10 breeds sit in the shorter-lived groups.
Method and limits
The lifespan and size figures come from our own library of 124 dog breed profiles. Lifespan ranges there follow the American Kennel Club's life expectancy figures for almost every purebred breed. For each breed we took the midpoint of the published lifespan range and the midpoint of the adult weight range, converting pounds to kilograms, then grouped breeds into toy, medium, large and giant by weight. Averages are simple means of those midpoints. Designer crosses have no measured lifespan of their own, so the 24 profiles without a published range are left out of the lifespan figures.
Limits, plainly: midpoints smooth over the real spread within a breed, and individual dogs vary enormously with genetics, care and luck. Our library is a curated set of common breeds, not a census of every dog, so treat these as informative patterns, not exact population figures. Popularity is sourced from the AKC's most-popular-breeds ranking.
Want the detail behind the numbers? Read any dog breed profile, put two breeds side by side with the comparison tool, or estimate an adult size with the puppy weight predictor. Caring for a dog into its later years? See senior pet care, compare how long every kind of pet lives on the pet lifespan chart, or see how the other side lives in the 2026 Cat Data Report.