托马斯·费尔法克斯（Thomas Fairfax，1612年－1671年），英国军事家，约克郡人，曾在英国内战中担任议会军统帅并取得胜利。他在军中声望很高，以勇敢着称，其关于防御的战略理论在历史上享有重要地位。他曾镇压长老派和平等派。1650年他不满奥利弗·克伦威尔实行独裁专断，愤而离职。

Thomas Fairfax, 3rd Lord Fairfax of Cameron (17 January 1612 – 12 November 1671) was a general and Parliamentary commander-in-chief during the English Civil War. An adept and talented commander, Fairfax led Parliament to many victories, notably the crucial battle of Naseby, becoming effectively military ruler of the new republic, but was eventually overshadowed by his subordinate Oliver Cromwell, who was more politically adept and radical in action against Charles I. Fairfax became unhappy with Cromwell's policy and publicly refused to take part in Charles's show trial. Eventually he resigned leaving Cromwell to control the republic. Because of this, and also his honourable battlefield conduct and his active role in the Restoration of the monarchy after Cromwell's death, he was exempted from the retribution exacted on many other leaders of the revolution. His dark hair and eyes and a swarthy complexion earned him the nickname "Black Tom".