The Cairn Terrier is a terrier breed originating in the Scottish Highlands and recognised as one of Scotland's earliest working dogs.
The name “Cairn Terrier” was a compromise suggestion when the breed was brought to official shows in the United Kingdom in 1909, initially under the name “Short-haired Skye terrier”. This name was not accepted by The Kennel Club when faced with opposition from breeders of the Skye Terrier. The alternative name Cairn Terrier was adopted.
International Cairn Terrier Day is on 19 December.