| Honorific Prefix: | Admiral The Honourable |
| Sir Cyril Douglas-Pennant | |
| Birth Date: | 7 April 1894 |
| Allegiance: |  United Kingdom |
| Serviceyears: | 1907–1953 |
| Rank: | Admiral |
| Commands: | The Nore |
| Branch: | Royal Navy |
| Battles: | World War I World War II |
| Awards: | Knight Commander of the Order of the Bath Commander of the Order of the British Empire Distinguished Service Order Distinguished Service Cross |
Admiral The Honourable Sir Cyril Eustace Douglas-Pennant KCB CBE DSO DSC (7 April 1894 – 3 April 1961) was a Royal Navy officer who went on to be Commander-in-Chief, The Nore.
Born the son of Frank Douglas-Pennant, 5th Baron Penrhyn, Cyril Douglas-Pennant joined the Royal Navy in 1907.[1] He served in World War I.[1]
He also served in World War II as Captain of the cruiser .[2] He went on to command the assault forces from which landed on Gold Beach during the Normandy landings in 1944.[3]
After the War he became Commandant of the Joint Services Staff College and then Flag Officer (Air) and Second in Command of the Mediterranean Fleet in 1948.[1] He was appointed Senior Naval Representative for the British Joint Services Mission to Washington, D.C., in 1950 and Commander-in-Chief, The Nore, in 1952.[1] He retired in 1953.[1]
In 1917 he married Phyllis Constance Leigh.[4] Following a divorce from his first wife, he married Sheila Brotherhood in 1937.[4]