Thomas Sheridan (1719 – 14 August 1788) was an Irish stage actor, an educator, and a major proponent of the elocution movement. He received his M.A. in 1743 from Trinity College in Dublin, and was the godson of Jonathan Swift. He also published a "respelled" dictionary of the English language (1780). He was married (1747) to Frances Chamberlaine. His son is the more famous Richard Brinsley Sheridan, while his daughter Alicia also wrote plays.