Mebyon Kernow – The Party for Cornwall (mɛbjɔn kərnou, MK; Cornish for Sons of Cornwall) is a Cornish nationalist, centre-left political party in Cornwall, in southwestern Britain. It currently has five elected councillors on Cornwall Council, and several town and parish councillors across Cornwall.
Influenced by the growth of Cornish nationalism in the first half of the twentieth century, Mebyon Kernow formed as a pressure group in 1951. Helena Charles was its first chair, while the novelist Daphne du Maurier was another early member. In 1953 Charles won a seat on a local council, although lost it in 1955. Support for MK grew in the 1960s in opposition to growing migration into Cornwall from parts of England. In the 1970s, MK became a fully-fledged political party, and since then it has fielded candidates in elections to the House of Commons and the European Parliament, as well as local government in Cornwall. Infighting during the 1980s decimated the party but it revived in the 1990