There are a total of 395 Dog breeds compiled and organized in this comprehensive list. The selection includes established breeds and long-standing regional varieties recognized by major kennel clubs, and excludes ephemeral designer crosses.

Dog breeds are groups of dogs selectively bred for consistent physical traits, behaviors and working abilities. They range from tiny companion types to large working and herding dogs and include regional landraces as well as standardized breeds. Breeds help predict size, exercise needs, health risks and typical temperament, which guides owners and breeders. Many breeds also serve specific roles such as hunting, guarding, herding or companionship.

Interesting and little-known facts about Dog breeds:
– Around 360 breeds are recognized by the Fédération Cynologique Internationale (FCI), while major national kennel clubs typically recognize about 200 breeds.
– Domestic dogs share over 99% of their DNA with gray wolves and likely diverged from common ancestors at least 15,000 years ago.
– Size ranges more than 40-fold between the smallest breeds (about 1.5–3 kg) and the largest (often over 54 kg), creating vast differences in care and needs.
– Labrador Retrievers have been the top-registered breed by the American Kennel Club for multiple decades, reflecting consistent popularity.
– Dogs can have roughly 300 million scent receptors compared with about 6 million in humans, giving them a vastly superior sense of smell.

The alphabetical index directs to A–Z lists of breeds organized by starting letter and brief introductions for each group. Each letter entry includes a sortable table with these columns: origin, size category, and temperament (2–4 concise adjectives).