In temperament the Airedale is confident, alert and lively, with the independent streak of a working terrier. It tends to stay playful well into adulthood and to be watchful with strangers. Admirers call it the King of Terriers. In the United States, President Warren Harding's Airedale, Laddie Boy, reportedly had his own chair at cabinet meetings.
The Airedale is a square, long-legged terrier with a long, flat head, small, folded V-shaped ears, and a beard and whiskers on the muzzle. The coat is hard, dense and wiry over a softer undercoat. A black or grizzle saddle covers the back and neck, and the head, ears, legs and underside are tan. For the show ring the coat is usually hand-stripped rather than clipped, which keeps its harsh texture.
The Airedale Terrier was known by such names as the Waterside Terrier and the Bingley Terrier before the Airedale name took hold in the late nineteenth century; the Kennel Club recognised the breed soon afterwards. Its size and steadiness soon took it beyond the riverbank. Owners used it to hunt larger game in North America and Africa, and it was among the first breeds trained for police work in Germany and Britain in the early twentieth century.