List of Famous people named Conn

Conn O'Neill was a member of the O'Neill dynasty, the most powerful Gaelic family in Ireland. He was the youngest son of Hugh O'Neill, Earl of Tyrone who had initially been a supporter of the Crown but led Tyrone's Rebellion between 1594–1603. He then made peace and was restored to royal favour following the Treaty of Mellifont. Conn's mother was Catherine O'Neill, Countess of Tyrone, from the Magennis family of Iveagh.

Constantine Falkland Cary Smythe, MC was a Canadian businessman, soldier and sportsman in ice hockey and horse racing. He is best known as the principal owner of the Toronto Maple Leafs of the National Hockey League (NHL) from 1927 to 1961 and as the builder of Maple Leaf Gardens. As owner of the Leafs during numerous championship years, his name appears on the Stanley Cup eight times: 1932, 1942, 1945, 1947, 1948, 1949, 1951 and 1962.

Conn Oge O'Donnell was a member of the O'Donnell dynasty of Donegal.