Hugh Trenchard, 1st Viscount Trenchard (1873–1956) was a British officer who was instrumental in establishing the Royal Air Force.

Trenchard may also refer to:

• Edward Trenchard, American naval officer
• Henry Trenchard (MP for Poole), English politician
• Hugh Trenchard, 3rd Viscount Trenchard (born 1951), British soldier and businessman
• John Trenchard (politician), Seventeenth Century English politician
• John Trenchard (writer), English political essayist
• Stephen Decatur Trenchard, American rear admiral
• Thomas Trenchard, American football coach
• Thomas Trenchard (Dorset MP)
• Thomas Trenchard (died 1671)
• Thomas Trenchard, 2nd Viscount Trenchard (1923–1987)

• Viscount Trenchard, a title in the Peerage of the United Kingdom
• Colonel Trenchard, a character in the Doctor Who serial The Sea Devils

• Brian Trenchard-Smith (born 1946), English director, producer, writer, and actor

This disambiguation page lists articles associated with the title Trenchard.
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