Conradh na Gaeilge is a social and cultural organisation which promotes the Irish language in Ireland and worldwide. The organisation was founded in 1893 with Douglas Hyde as its first president, when it emerged as the successor of several 19th century groups such as the Gaelic Union. The organisation was a spearhead of the Gaelic revival and of Gaeilgeoir activism.

Irish, also known as Irish Gaelic or simply Gaelic, is a Goidelic language of the Insular Celtic branch of the Celtic language group, which is a part of the Indo-European language family. Irish is indigenous to the island of Ireland and was the population's first language until the 19th century, when English gradually became dominant, particularly in the last decades of the century. Today, Irish is still commonly spoken as a first language in areas of Ireland collectively known as the Gaeltacht, in which only 2% of Ireland's population lived in 2022.