Sir Thomas Shirley, 1st Baronet (30 December 1727 – 18 February 1800) was a British colonial governor and military officer. The son of William Shirley, a politically well-connected colonial administrator who served for many years as governor of the Province of Massachusetts Bay, Shirley entered the military, serving in the Louisbourg expedition his father organised in 1745. During the Seven Years' War he served on Menorca and in the 1761 Capture of Belle Île.