Geoffrey Hornby
| Sir Geoffrey Hornby | |
|---|---|
| Sir Geoffrey Hornby in 1895 | |
| Born | 10 February 1825 Winwick, Lancashire, United Kingdom | 
| Died | 3 March 1895 (aged 70) Lordington House, Sussex, United Kingdom | 
| Cause of death | Influenza | 
| Allegiance | United Kingdom | 
| Service | Royal Navy | 
| Years of service | 1837–1895 | 
| Rank | Admiral of the Fleet | 
| Commands | 
 | 
| Battles / wars | |
| Awards | Knight Grand Cross of the Order of the Bath | 
| Spouse(s) | Emily Frances Coles (m. 1853) | 
| Children | 5 | 
| Relations | Sir Phipps Hornby (father) James John Hornby (brother) Edmund Phipps-Hornby (son) Robert Hornby (son) | 
Admiral of the Fleet Sir Geoffrey Thomas Phipps Hornby GCB (10 February 1825 – 3 March 1895) was a Royal Navy officer. As a junior officer, he saw action at the capture of Acre in November 1840 during the Egyptian–Ottoman War. As a captain, he was assigned to Vancouver Island with a naval brigade where he found a unit of United States troops ready to take over the San Juan Islands in a dispute that became known as the Pig War. Hornby used his powers of diplomacy to facilitate a peaceful handover of the islands to the United States.
Hornby went on to be Commander-in-Chief, West Africa Squadron, Commander-in-Chief of the Flying Squadron and then Commander-in-Chief, Channel Squadron. After that he became Commander-in-Chief, Mediterranean Fleet, President of the Royal Naval College, Greenwich and finally Commander-in-Chief, Portsmouth.