The Harrier is widely regarded as one of the oldest scent hound breeds developed in England, with roots stretching back to the medieval period. Early references to packs of hare-hunting hounds in England appear as far back as the thirteenth century, and although the precise ancestry of the Harrier remains a subject of scholarly debate, most historians agree that the breed descends from crosses between various English hound types that were selectively bred for stamina, nose work, and cooperative pack behavior.
Some breed historians believe the Harrier may trace part of its lineage to now-extinct French hound breeds that were brought to England following the Norman Conquest in 1066. These Continental influences may have contributed the Harrier's refined scenting ability and its characteristic melodious voice. Others point to the Talbot Hound, the Southern Hound, and early Foxhound types as the primary building blocks of the breed.
The name itself likely derives from the Norman French word for hound, though a popular folk etymology connects it directly to the word "hare," reflecting the breed's original quarry. Regardless of the name's precise origin, the Harrier was purpose-built to pursue hares at a moderate pace, allowing hunters on foot to keep up with the pack — a distinction that set it apart from the faster Foxhound, which was developed for mounted hunters.
By the eighteenth century, the Harrier had become firmly established as a distinct breed type in the English countryside. Landowners and rural communities maintained carefully managed packs, and breeding records from this era show a growing emphasis on uniformity of appearance and reliable pack temperament. These early breeding programs laid the groundwork for the standardized Harrier recognized by kennel clubs today.