| Lord Cecil Manners | |
| Office: | Member of Parliament for Melton |
| Term Start: | 1900 |
| Term End: | 1906 |
| Predecessor: | Lord Edward Manners |
| Successor: | Henry de Rosenbach Walker |
| Birth Name: | Cecil Reginald John Manners |
| Birth Date: | 4 February 1868 |
| Birth Place: | Camden, London |
| Death Place: | Crowborough, Sussex |
| Death Cause: | Suicide |
| Party: | Conservative |
| Parents: | John Manners, 7th Duke of Rutland Janetta Manners, Duchess of Rutland |
Lord Cecil Reginald John Manners DL (4 February 1868 – 8 September 1945) was a British Conservative politician and aristocrat.
Manners was born at 6 Cumberland Terrace, Camden,[1] the second son of John Manners, 7th Duke of Rutland, by his second marriage to Janetta Hughan, daughter of Thomas Hughan. Henry Manners, 8th Duke of Rutland, was his half-brother and Lord Edward Manners his brother. His half-nephew was John Manners, 9th Duke of Rutland.[2] He was educated at Charterhouse School and Trinity College, Cambridge.
In early 1900 he visited South Africa, travelling with troops taking part in the Second Boer War.[3] While acting as a newspaper correspondent, he was among the prisoners captured by the Boers in the course of Lord Roberts' advance on 29 May 1900.[4]
He succeeded his brother as Member of Parliament for Melton in 1900, a seat he held until 1906. On 10 June 1902, he was appointed a Deputy Lieutenant for Derbyshire.
Manners died by suicide in September 1945, aged 77, killed by a train at Crowborough railway station.[5] A fully-loaded six-chambered revolver, with the hammer cocked, was found on his body. The cause of death was determined to be "decapitation by throwing himself in front of a train while the balance of mind was disturbed."[6]