The Irish National Teachers' Organisation (INTO) (Irish: Cumann Múinteoirí Éireann), founded in 1868, is the oldest and largest teachers' trade union in Ireland. It represents teachers at primary level in the Republic of Ireland, and at primary and post-primary level in Northern Ireland. The head office is at Parnell Square, Dublin, and there is a Northern Irish office in Belfast. The current INTO President (2023–24) is Dorothy McGinley; John Boyle is the General Secretary and Mark McTaggart is the Northern Secretary.

Thomas Joseph O'Connell was an Irish Labour Party politician who served as Leader of the Labour Party from 1927 to 1932. He served as a Teachta Dála (TD) from 1922 to 1932. He was a Senator for the Cultural and Educational Panel from 1938 to 1944, 1948 to 1951 and 1954 to 1957.