The Scottish Terrier (also known as the Aberdeen Terrier), popularly called the Scottie, was one of the highland breeds of Terrier that were grouped under the name of Skye Terrier, and one of five breeds of terrier that originated in Scotland. They are an independent and rugged breed with a wiry outer coat and a soft dense undercoat. The Fourth Earl of Dumbarton nicknamed the breed "the diehard." The modern breed is said to be able to trace its lineage back to a single female, named Splinter II.

They are a small breed of Terrier with a distinctive shape and have had many roles in popular culture. Described as a territorial, feisty dog, they can make a good watchdog and tend to be very loyal to their family. They are also one of the more successful dog breeds at the Westminster Kennel Club Dog Show with a recent best in show in 2010.