Vice Admiral Sir William Johnstone Hope, GCB (16 August 1766 – 2 May 1831) was a prominent and controversial British Royal Navy officer and politician in late eighteenth and early nineteenth century Britain, whose career experienced fleet actions, disputes with royalty, party politics and entry to both Russian and British orders of chivalry. A popular officer, Hope served with Nelson, Duncan and Lord Keith through several campaigns, making connections which enabled him to secure a lengthy political career after his retirement from the Royal Navy in 1804 due to ill-health. After 26 years in Parliament, Hope was largely inactive and instead served as a Lord of the Admiralty and commissioner of Greenwich Naval Hospital.