The breed's origin is not known. It is believed to have descended from the black and tan terrier-type dogs of the British Isles, just like the Kerry Blue and Irish Soft-haired Wheaten Terriers in Ireland or the Welsh, Lakeland and Scottish Terriers in Great Britain. F. M. Jowett writes in The Irish Terrier, 'Our Dogs' Publishing Co. Ltd., Manchester, England 1947 - 7th Edition: They are described by an old Irish writer as being the poor man's sentinel, the farmer's friend, and the gentleman's favourite...These dogs were originally bred not so much for their looks as for their working qualities and gameness, the Irish Terrier being by instinct a thorough vermin killer. They were formerly of all types and of all colours - black-and-tan, grey-and-brindle, wheaten of all shades, and red being the predominant colours. Colour or size evidently did not matter if they were hardy and game." The proper selection process of the breed began only in the latter 19th century. They were shown now and then, sometimes in one class, sometimes in separate classes for dogs under and over 9 pounds. The first breed club was set up in Dublin in 1879. Irish Terriers were the first members of the terrier group to be recognized by the English Kennel Club as a native Irish Breed - this happened just before the end of the 19th century. The first Irish Terriers were taken to the US in late 19th century and quickly became somewhat popular. Although the breed has never been very "fashionable", there used to be big influential kennels in Ireland, the Great Britain and US up to the 1960s. Nowadays there is ambitious breeding in many continents, including North America, (Northern) Europe and Australia.

The Irish Terrier is a dog breed from Ireland, one of many breeds of Terrier. The Irish Terrier is an active, compactly sized dog that is suited for life in both rural and city environments. The red, harsh coat protects an Irish Terrier well in all kinds of weather.