NTA may refer to:

• National Tax Agency, the official tax collecting agency of Japan
• National Testing Agency, government agency which conducts entrance examinations for higher educational institutions in India
• National Transport Authority (Ireland), the public transport licensing agency for Ireland
• National Treasury Administration, the agency of the Ministry of Finance in Taiwan
• National Treatment Agency for Substance Misuse, was a special health authority in England
• Nepal Telecommunications Authority
• Nigerian Television Authority, a government-owned broadcasting television network in Nigeria
• Northern Territory Administration, an Australian Government department prior to self-government

• National Tax Association, a non-profit organization in United States
• National Telefilm Associates, was an independent film distribution company
• National Television Awards, a British awards ceremony
• Natural Science and Technical Academy Isny, a private German university
• Newark Teachers Association, a trade union in California, United States
• NTA Film Network, a former American television network
• Nuclei Territoriali Antimperialisti, an Italian terrorist group

• Nanoparticle Tracking Analysis, a method for visualizing and analyzing particles
• Native Title Act 1993, Australian federal legislation
• Neighborhood Tabulation Area, a geographical unit used for projecting demographics of New York City
• New Transatlantic Agenda, establishment of relations between the US and EU, agreed to in 1995.
• Newton Abbot railway station, Devon, England
• Nitrilotriacetic acid, an aminopolycarboxylic acid

This disambiguation page lists articles associated with the title NTA.
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