NSU may refer to:

• NSU Motorenwerke AG, a German manufacturer of cars and motorcycles
• Non-Specific Urethritis, a type of inflammation of the urethra
• Commonwealth Railways NSU class, an Australia class of diesel-electric locomotive
• North Shore United, a New Zealand soccer club
• "N.S.U.", a song by the rock band Cream from their debut album Fresh Cream
• National Socialist Underground (German: Nationalsozialistischer Untergrund; short NSU), a German right-wing terror group.
• Not So Urbane (slang!)

Universities in the United States

• New School University, New York
• Nicholls State University, Louisiana
• Norfolk State University, Virginia
• Northeastern State University, Oklahoma
• Northern State University, South Dakota
• Northwestern State University, Louisiana
• Nova Southeastern University, Florida

Other universities

• Naval State University, Philippines
• Nordic Summer University, Scandinavia
• North South University, Bangladesh
• Novosibirsk State University, Russia

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