USD is an abbreviation for the United States dollar, the official currency of the United States.

Look up USD or us'd in Wiktionary, the free dictionary.

USD may also refer to:

• Ultrasonic Silent Drive, Tamron lens designation
• Under Secretary of Defense, United States
• Unified school district
• Unité spéciale de détention (USD), the French name of the Special Handling Unit (SHU) at the Regional Reception Centre, a Canadian prison
• Sanata Dharma University (Universitas Sanata Dharma), Indonesia
• University of San Diego, San Diego, California, United States
• University of South Dakota, Vermillion, South Dakota, United States
• Universal Scene Description, an open-source graphics framework by Pixar, and associated .usd file format
• The Upside Down, Houdini's term for the Chinese Water Torture Cell
• Upside-down motorcycle fork

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