William Nugent (died 1690) was an Irish soldier of the seventeenth century.
An Irish Catholic, he was a Jacobite supporter of James II, who appointed him Lord Lieutenant of County Longford.[1] He also served as a Brigadier in the Irish Army. He was fatally wounded during the Battle of Cavan, which took place on 11 February 1690 near the town of Cavan in southern Ulster[2] between forces of Williamite and Jacobite troops during the Williamite War in Ireland. The battle ended in a victory for the Williamites, who captured, sacked and burned the town of Cavan.