The Beagle breed is so old that its ancestry is lost in time. Many Beagle enthusiasts hold different ideas about the history of the breed, but most agree that it is probably one of the oldest Hounds. Packs of these dogs may have existed across Britain before Roman times, when they worked as hunters and trackers. They are certainly one of the progenitors of Foxhounds, and perhaps, many other Hounds as well.

The breed name probably derived from the French word "begueule" meaning gape throat, and refers to the tonguing (type of barking) made by a pack on the hunt. The modern breed evolved in the United States to have a larger body and balanced appearance. Eligible in field trials, gundog bench shows, and conformation shows, Beagles compete in one of two different height classes: the Beagles that are 13 inch and under compete in the 13" class and the Beagles that are over 13 inches but not more than 15 inches tall compete in the 15" class. Beagles that are over 15" tall are eligible for registration, but they can not compete in field trials or bench shows in the United States. Beagles are measured across the top of the front shoulders when they are standing correctly (no arching upward of the back or no crouching down on the front legs). They still actively participate in hunting sports, as individuals, braces (two dogs), and packs (3 -70 dogs).

As pets, they require plenty of space, social contact and physical activity. Beagles have long been reliable, loyal, and trusted companions. Beagles that are bred with disposition, conformation, and tracking abilities as equally important qualities make the perfect multi-purpose hound. Beagles can be kept as a family pet in the house, kennel, or backyard while also being used as a hunting hound for rabbits, hares or other types of game; entered into gundog Beagle field trials; competed for conformation qualities at gundog bench shows; and even do extremely well in tracking, agility, and obedience competitions.