The Pembroke Welsh Corgi is one of two dog breeds known as Welsh Corgis that originated in Wales. They are believed to be descended from Swedish Vallhund dogs that came to Wales with the Vikings. The phrase "cor gi" translates to "dwarf dog" in Welsh. A Pembroke is between 10 and 12 inches (250 to 300 mm) tall at the withers (tallest point in the shoulders) and weighs no more than 30 lb (15 kg); dogs in peak condition weigh about 27 pounds for the male and bitches about 2 pounds lighter.

Originally bred for herding sheep and cattle, they have proven themselves as excellent companion animals and are outstanding competitors in sheepdog trials and dog agility. Like most herding breeds, they are intelligent, active, and athletic dogs despite their shorter legs.

Though still sometimes used as a working dog, today they are more commonly kept as companions. They are a happy, loving, and eager to please. Pembrokes are intelligent and quick thinkers, which can make them challenging to train, but their desire to please means that they thrive on praise.

Pembrokes can be red, sable, fawn, or black and tan with or without white markings on the legs, chest, neck, muzzle, underneath, and as a narrow blaze on the head. Too much white is considered a fault in show dogs.

Historically, the Pembroke was a breed with a natural bob tail (very short tail). Due to the advent of docking, the trait was not aggressively pursued, with breeders focusing instead on other characteristics, and the tail artificially shortened if need be. Given that some countries are now banning docking, breeders are again attempting to select for dogs with the genes for natural bob tails. The length of the spine can cause spinal problems and early arthritis in Corgis.

See also Cardigan Welsh Corgi