Charles William Francis Noel, 3rd Earl of Gainsborough DL (20 October 1850 – 17 April 1926) was a British peer and soldier.
He was the son of Charles Noel, 2nd Earl of Gainsborough, a Member of Parliament for Rutland, and Lady Ida Harriet Augusta, who died in 1867.
His father was the son of Charles Noel, 1st Earl of Gainsborough, and his second wife Elizabeth, herself the daughter of Sir George Grey, 1st Baronet.
Through his eldest daughter, he was the grandfather of Brydgytte Blanche Bentinck (1916–2010), who married Jonkheer Adrian Hendrik Sibble van der Wyck (1906–1973) on 2 February 1937 in London, with whom she had five children; and Henry Noel Bentinck, who later became the 11th Earl of Portland upon the death of his distant cousin, the 9th Duke of Portland.
Through his second daughter, Lady Clare, he was the grandfather of Agnes Celestria Mary King (1917–1946), who married Charles Guy Vaughan-Lee.