Charles Cecil John Manners, 6th Duke of Rutland KG (16 May 1815 – 3 March 1888, in Belvoir Castle), styled Marquess of Granby before 1857, was an English Conservative politician.

[2] Following the resignation of Lord George Bentinck from the leadership of the protectionists in the House of Commons at the beginning of 1848, Granby (as he was then known) became the leader on 10 February 1848, as Benjamin Disraeli was unacceptable to Lord Derby, the overall leader of the party, and the majority of the rank and file.

Granby resigned on 4 March 1848, feeling himself inadequate to the post, and the party functioned without an actual leader in the Commons for the remainder of the parliamentary session.

He also succeeded his father as Lord Lieutenant of Leicestershire, which post he held until his death on 4 March 1888,[2] at the age of 72.

He had cherished a passion for Mary Anne Ricketts, later Lady Forester, but his father forbade the two to marry.