NBA may stand for:

• National Basketball Association (U.S.)
• NBA TV, a television network showcasing the National Basketball Association
• National Boxing Association (U.S.), a major boxing sanctioning body which became the World Boxing Association in 1962
• National Boxing Association (Second Version), a minor boxing sanctioning body, founded in 1984
• National Braille Association (U.S.)
• North British Academy of Arts (UK)
• Net Book Agreement (UK)
• Newcastle Brown Ale (UK)
• National Bar Association (U.S.)
• National Book Award, an award given for literary achievement in the U.S.
• Narmada Bachao Andolan, a political movement in India against a dam built on the Narmada river
• Neue Bach-Ausgabe, the second complete edition of the music of J. S. Bach
• 3-Nitrobenzyl alcohol
• 3-Nitrobenzanthrone

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