General Lord Robert Manners (c. 1721 – 31 May 1782) was an English soldier and nobleman. He was a son of John Manners, 2nd Duke of Rutland and his second wife, Lucy Sherard. He purchased an ensigncy in the Coldstream Guards on 26 July 1735, and was promoted lieutenant in May 1740. On 22 April 1742, he was promoted captain and lieutenant-colonel in the 1st Foot Guards, and in December 1747, colonel and aide-de-camp to King George II. Manners was returned as Member of Parliament for Kingston-upon-Hull in 1747, and kept the seat for the remainder of his life.