Field Marshal Sir Robert Rich, 4th Baronet (3 July 1685 – 1 February 1768) was a British cavalry officer. As a junior officer he fought at the Battle of Schellenberg and at the Battle of Blenheim during the War of the Spanish Succession. He was then asked the raise a regiment to combat the threat from the Jacobite rising of 1715. He also served with the Pragmatic Army under the Earl of Stair at the Battle of Dettingen during the War of the Austrian Succession. As a Member of Parliament he represented three different constituencies but never attained political office.