
The Alapaha Blue Blood Bulldog is a breed of bulldog from the United States, and it is predominantly used as a guard dog. It is a very powerful, muscular breed with large head and brachycephalic muzzle. The hair coat is short, typically colored white with black, blue, buff or brown patches, and its tail is kept un-docked. Sexual dimorphism is common in the breed, with larger dogs typically twice the weight of smaller bitches.

The Alaskan Klee Kai is a spitz-type breed of dog, developed in the late 20th century as a companion-sized dog resembling the larger Alaskan Husky. It is an energetic, intelligent dog with an appearance that reflects its northern heritage. Bred in three sizes, its weight range is from 5 to 22 pounds as an adult.

The Alaskan Malamute is a large breed of domestic dog originally bred for their strength and endurance to haul heavy freight as a sled dog and hound. They are similar to other arctic, husky, and spitz breeds such as the Greenland Dog, Canadian Eskimo Dog, the Siberian Husky, and the Samoyed.

The American Bulldog is a large breed of utility dog descended from the now-extinct Old English Bulldog. They are now used on animal farms, dog sports, and for showing. They are part of American culture and history, and may be used as a cultural icon for the United States. They are generally represented as being strong and tough. In November 2019, the American Bulldog was added to the American Kennel Club (AKC) Foundation Stock Service (FSS).

The American Bully is a recently formed companion dog breed, originally recognized by the American Bully Kennel Club (ABKC). It has been recognized by the United Kennel Club (UKC) since July 15, 2013. The breed has not been recognized by the American Kennel Club (AKC). The American Bully is a small to large breed, which has been divided into four categories by some registering organizations, including Pocket, Standard, Classic, and XL. Other organizations, including the UKC, have one consistent size standard.

The American Cocker Spaniel is a breed of sporting dog. It is a spaniel type dog that is closely related to the English Cocker Spaniel; the two breeds diverged during the 20th century due to differing breed standards in the US and the UK. In the United States, the breed is usually called a Cocker Spaniel, while elsewhere in the world, it is called an American Cocker Spaniel to distinguish it from its older English cousin. The word cocker is commonly held to stem from their use to hunt woodcock in England, while spaniel is thought to be derived from the breed's origins in Spain.

The English Coonhound, also referred to as the American English Coonhound or the Redtick Coonhound, is a breed of coonhound that originated in and is typically bred in the Southern United States. It is descended from hunting hounds, especially foxhounds, brought to America by settlers during the 17th and 18th centuries. The breed's first recognition came from the United Kennel Club in 1905 as the English Fox and Coonhound. Further recognition has been granted in recent years by the American Kennel Club, first in the Foundation Stock Service and in 2011 as a fully recognized member of the hound group.

The American Foxhound is a breed of dog that is a cousin of the English Foxhound. They are scent hounds, bred to hunt foxes by scent.

The American Hairless Terrier is a breed of feist from the United States that was derived from the Rat Terrier. The breed descends from a single Rat Terrier that was born in 1972 in Louisiana whose descendants were bred for hairlessness. Originally registered as a hairless variety of Rat Terrier, in 2004 the United Kennel Club granted the American Hairless Terrier recognition, in 2016 the American Kennel Club followed suit. Many American Hairless Terriers are still born with a coat, recognised as a coated variety.

The American Leopard Hound is an American breed of hunting dog. It is recognized by the United Kennel Club (UKC) as a scenthound and is in the American Kennel Club's Foundation Stock Service.

The American Pit Bull Terrier (APBT) is a purebred dog breed recognized by the United Kennel Club (UKC) and the American Dog Breeders Association (ADBA), but not the American Kennel Club (AKC). It is a medium-sized, intelligent, short-haired dog, of a solid build, whose early ancestors came from the British Isles. When compared with the English Staffordshire Bull Terrier, the American Pit Bull Terrier is larger by margins of 6–8 inches (15–20 cm) in height and 25–35 pounds (11–16 kg) in weight. The American Pit Bull Terrier varies in size: males are normally about 18–21 inches (45–53 cm) in height and around 35–60 pounds (15–27 kg) in weight, while females are normally around 17–20 inches (43–50 cm) in height and 30–50 pounds (13–22 kg) in weight.

The American Staffordshire Terrier, also known as the AmStaff or American Staffy is a medium-sized, short-coated American dog breed.
The American Water Spaniel,, is a breed of spaniel which originated in the United States. It was developed in the state of Wisconsin during the 19th century from a number of other breeds, including the Irish and English Water Spaniels. The breed was saved by Dr. Fred J. Pfeifer, who set up the breed club and standard, and whose work led to recognition for the breed by the United Kennel Club, and later, the American Kennel Club. While they are the state dog of Wisconsin, they remain a rare breed.

The Australian Shepherd, often known simply as the "Aussie", is a medium-sized breed of dog that was developed in the United States, and identified as a breed in the early 20th century. The preceding forebears of the foundation dogs likely had several sources, but were primarily UK rural landrace herding collies of various types and/or regions. Other landrace types that oral histories commonly attribute to Australian Shepherd ancestry include herding farmcollies of the Iberian peninsula and German herding farmcollie types, with possible connections via travel to Australia prior to travel to the United States. There is disagreement regarding the exact provenance of the breed's progenitures, prior to their arrival in the United States, and thus no official consensus on the origin of the breed name or association with Australia, or on exactly which landrace dogs contributed to the foundation dogs' gene pool.

The Black and Tan Coonhound is a breed of hunting dog. Developed in the United States from crosses between the Bloodhound and the Black and Tan Virginia Foxhound, this scent hound runs its game entirely by scent and is used primarily for raccoon hunting.

The Black Mouth Cur is a hunting and cattle dog that has its origins in Southern United States.

The Lacy Dog or Blue Lacy Dog is a breed of working dog that originated in Texas in the mid-19th century. The Lacy was first recognized in 2001 by the Texas Senate. In Senate Resolution No. 436, the 77th Legislature honored the Lacy as "a true Texas breed". In June 2005, Governor Rick Perry signed the legislation adopting the Blue Lacy as "the official State Dog Breed of Texas". As expected, the vast majority of Lacy dogs are found in Texas. However, as the breed becomes more well recognized, there are breeding populations being established across the United States, Canada, and most recently in Europe.

The Bluetick Coonhound is a breed of coonhound originating in the United States. The Bluetick Coonhound is known for its friendly persona, cold nose, and deep bawl mouth. It is most commonly used as a raccoon hunting dog, but may also be kept as a pet.
The Boston Terrier is a breed of dog originating in the United States of America. This "American Gentleman" was accepted in 1893 by the American Kennel Club as a non-sporting breed. Color and markings are important when distinguishing this breed from the AKC standard. They should be either black, brindle or seal with white markings. Boston Terriers are small and compact with a short tail and erect ears. The AKC says they are highly intelligent and very easily trained. They are friendly and can be stubborn at times. The average life span of a Boston Terrier is around 11 to 13 years, though some can live up to around 18 years. They have a short nose, which can often cause breathing problems later in life, which is what leads to a low life expectancy.

The Boykin Spaniel is a medium-sized breed of dog, a Spaniel bred for hunting wild turkeys and ducks in the Wateree River Swamp of South Carolina, in the United States. It is the state dog of South Carolina, where it was discovered and further developed by hunters in the 1900s. 1 September is Boykin Spaniel Day in South Carolina.

The Carolina dog, also known as a yellow dog, yaller dog, American Dingo, or Dixie Dingo, is a breed of medium-sized, feral dog that lives mostly in the Southeastern United States, especially in isolated stretches of longleaf pines and cypress swamps. Rehoming of Carolina dogs has recently become popular, and they can make good domestic pets with proper socialization. Since 2008, artificial selection efforts to establish them as a standardized breed has made some progress, with recognition in two smaller national kennel clubs, and acceptance into the breed-establishment program of a major one.

The Catahoula Leopard Dog is an American dog breed named after Catahoula Parish, Louisiana. It became the state dog of Louisiana in 1979. It is recognized by the United Kennel Club (UKC) under the name Louisiana Catahoula Leopard Dog, and Catahoula Leopard Dog in the American Kennel Club (AKC) Foundation Stock Service. Both registries have assigned the breed a herding group designation. It has traditionally been used in hunting feral boars.

The Chesapeake Bay Retriever is a large-sized breed of dog belonging to the Retriever, Gundog, and Sporting breed groups. The breed was developed in the United States Chesapeake Bay area during the 19th century. Historically used by area market hunters to retrieve waterfowl, pull fishing nets, and rescue fishermen, it is primarily a family pet and hunting companion. They are often known for their love of water and their ability to hunt. It is a medium to large sized dog similar in appearance to the Labrador Retriever. The Chesapeake has a wavy coat, rather than the Labrador's smooth coat. They are described as having a bright and happy disposition, courage, willingness to work, alertness, intelligence, and love of water as some of their characteristics.

The Chinook is a breed of sled dog, developed in the state of New Hampshire during the early 20th century. The Chinook is New Hampshire's official state dog.

The English Shepherd is a breed of herding dog from the United States, it is descended from various collies brought to the New World by British settlers.

The Hare Indian dog is an extinct domesticated canine; possibly a breed of domestic dog, coydog, or domesticated coyote; formerly found and originally bred in northern Canada by the Hare Indians for coursing. It had the speed and some characteristics of the coyote, but the domesticated temperament and other characteristics of a domestic dog. It gradually lost its usefulness as aboriginal hunting methods declined, and became extinct or lost its separate identity through interbreeding with dogs in the 19th century, though some claim the breed still exists in modified form.

The Hawaiian Poi Dog is an extinct breed of pariah dog from Hawaiʻi which was used by Native Hawaiians as a spiritual protector of children and as a source of food.

The McNab Dog, also called the McNab Shepherd or McNab Collie is a herding dog that originated in Hopland, Mendocino County, Northern California. The McNab was bred to withstand the tough conditions found in California such as heat, burrs, foxtails, and rugged terrain. Until recently, the McNab was little known outside California, but in last three decades have seen a gain in popularity and geographic dispersal of the breed.

The Miniature American Shepherd, frequently abbreviated MAS, is a small herding dog breed. The MAS is highly intelligent and biddable. The breed is often trained for dog sports such as herding, agility, obedience, canine freestyle, flyball, and others. The Miniature American Shepherd was recognized by the American Kennel Club (AKC) in 2015 and is the club's 186th breed. In September 2019, the Fédération Cynologique Internationale (FCI) officially accepted the breed.

The Mountain Cur is a type of working dog that is bred specifically for treeing and trailing small game, like squirrel and raccoons. They are also used for hunting and baying big game like bear and wild boar as well as being an all-purpose farm dog. Curs are a member of the Hound group, and the Mountain Cur is one of several varieties of cur. It can also be used as a water dog. Mainly bred in Ohio, Kentucky, Virginia, and Tennessee, it has been registered with the United Kennel Club since 1998. The Mountain Cur Breeder's Association was formed in 1957.

The Olde English Bulldogge is an American dog breed, recognized by the United Kennel Club (UKC) in January 2014. The breed is listed in the UKC Guardian Dog Group. Five years prior to UKC recognition, the breed was registered by the former Canine Developmental, Health and Performance Registry (CDHPR), a privately held business located in Kalamazoo, Michigan. In the early 2000s, CDHPR had been working with the UKC under a unique agreement to develop breeding plans and strategies in an effort to produce improved breeds of dogs that would be accepted as purebred and, therefore, eligible for UKC registration.

Pit bull is a term used in the United States for a type of dog descended from bulldogs and terriers, while in other countries such as the United Kingdom the term is used as an abbreviation of the American Pit Bull Terrier breed. The term was first used in 1927. Within the United States the pit bull is usually considered a heterogeneous grouping that includes the breeds American Pit Bull Terrier, American Staffordshire Terrier, American Bully, Staffordshire Bull Terrier and occasionally the American Bulldog, along with any crossbred dog that shares certain physical characteristics with these breeds. In other countries including Britain the Staffordshire Bull Terrier is not considered a pit bull. Most pit bull–type dogs descend from the British Bull and terrier, a 19th century dog-fighting type developed from crosses between the Old English Bulldog and the Old English Terrier.
The Plott Hound is a large scent hound, originally bred for hunting bears. In 1989, the North Carolina General Assembly designated the Plott Hound as the official State Dog. The Plott Hound was first registered with the United Kennel Club in 1946. Plott Hounds were recognized by the American Kennel Club in 2006 and were exhibited at the Westminster Show in 2008.

The Rat Terrier is an American dog breed with a background as a farm dog and hunting companion. They share much ancestry with the small hunting dogs known as feists. Common throughout family farms in the 1920s and 1930s, they are now recognized by the United and American Kennel Clubs and are considered a rare breed. Today's Rat Terrier is an intelligent and active small dog that is kept both for pest control and as a family pet.

The Redbone Coonhound is a tenacious hunting dog used for hunting raccoon, deer, bear, boar, cougar, or any other large game. The breed originated in the Southern United States and is highlighted by their deep red coat. Described by the American Kennel Club as having "an overall impression that a master sculptor carved them from blocks of the finest mahogany," the Redbone blends an unrelenting hunter with a loving family dog.

The Salish Wool Dog or Comox dog is an extinct breed of white, long-haired, Spitz-type dog that was developed and bred by the Coast Salish peoples of what is now Washington state and British Columbia. The small, long-haired wool dog and the coyote-like village dog were deliberately maintained as separate populations. The dogs were kept in packs of about 12 to 20 animals, and fed primarily raw and cooked salmon. To keep the breed true to type and the preferred white color, Salish Wool Dogs were confined on islands and in gated caves.

The Silken Windhound is an American breed of sighthound. Like most sighthounds, Silkens are noted coursers.

The Stephens Stock, also known as the Stephens Stock Mountain Cur or simply the Stephens Cur, is a breed of cur from the United States.

The Teddy Roosevelt Terrier is a small to medium-sized American hunting terrier. It is lower-set, with shorter legs, and is more muscular with heavier bone density than the related American Rat Terrier. Much diversity exists in the history of the Teddy Roosevelt Terrier breed, and it shares a common early history with the American Rat Terrier, Fox Paulistinha, and Tenterfield Terrier. The Rat Terrier's background is said to stem from the terriers or other dogs that were brought over by early English and other working-class immigrants. Since the breed was a farm, hunting, and utility dog, little to no planned breeding was used other than breeding dogs with agreeable traits to each other to produce the desired work ethic in the dog. The Feist (dog), Bull Terrier, Smooth Fox Terrier, Manchester Terrier, Whippet, Italian Greyhound, the now extinct English White Terrier, Turnspit Dog, and Wry-legged Terrier all share in the Teddy Roosevelt Terrier's ancestry. These early ratting terriers were then most likely bred to the Beagle or Beagle crossbred dogs and other dogs. Maximizing the influences from these various breeds provides the modern Teddy Roosevelt Terrier with a keen sense of awareness and prey drive, an acute sense of smell. and a very high intellect. Although they tend to be aloof with strangers, they are devoted companion dogs with a strong desire to please and be near their owners at all times.

The Toy Fox Terrier is a small terrier breed of dog, directly descended from the larger Fox Terrier but considered a separate breed.

The Toy Manchester Terrier is a breed of dog, categorized as a terrier. The breed was bred down in size in North America from the Manchester Terrier, and is placed in the Toy Group by the American Kennel Club and the Canadian Kennel Club. Neither the Fédération Cynologique Internationale nor The Kennel Club recognize a Toy variety of the Manchester Terrier.

The Treeing Feist is a breed of feist from the Southeastern United States. Originally considered a single breed, the Mountain Feist is now considered a separate breed with both being separately recognized by the United Kennel Club.

The Treeing Tennessee Brindle is a breed of cur. Since 1995, its records have been maintained through the American Kennel Club's Foundation Stock Service Program.

The Treeing Walker Coonhound is a breed of hound descended from the English and American Foxhounds. The breed originated in the United States when a dog known as "Tennessee Lead," was crossed into the Walker Hound in the 19th century. The Treeing Walker Coonhound was recognized officially as a breed by the United Kennel Club in 1945 and by the American Kennel Club in 2012.

The Trigg Hound is a variety of the American Foxhound, developed in Kentucky by Colonel Haiden Trigg.

The White Shepherd is a variety of the German Shepherd bred in the United States. White coated German Shepherds have been known in Europe as early as 1882, in 1933 the breed’s standard was amended in their native Germany, banning white coated dogs from registration. In the United States and Canada the coloration had gained a following and in 1969 a breed club was formed specifically for white coloured German Shepherds, calling their variety the White Shepherd. The variety is recognized as a separate breed by the United Kennel Club.