Insular Celtic languages are those Celtic languages that originated in the British Isles, in contrast to the Continental Celtic languages of mainland Europe and Anatolia. All surviving Celtic languages are from the Insular Celtic group, including that which is now spoken in Continental Europe; the Continental Celtic languages are extinct. The six Insular Celtic languages of modern times can be divided into:

• the Goidelic languages: Irish, Manx, and Scottish Gaelic
• the Brittonic languages: Breton, Cornish, and Welsh (another language or dialect, Cumbric, is extinct).