Agnes Campbell

Lady Agnes Campbell (1526 – in or after 1590) was a Scottish noblewoman and queen consort of Tír Eoghain. She was the mother of Iníon Dubh and the maternal grandmother of Red Hugh O'Donnell.

Campbell was a skilled diplomat and political leader. Her influence over the reign of her second husband, Sir Turlough Luineach O'Neill, Lord of Tír Eoghain, is noted by both contemporary and modern sources. Many, including Lord Deputy Sir Henry Sidney, viewed her as Tír Eoghain's primary leader.