TNA

• Tamil National Alliance, a political coalition in Sri Lanka
• The National Archives, in the United Kingdom
• The New Amsterdams, a band
• Threose nucleic acid, an analog of the nucleic acid DNA
• Tonga Nurses' Association
• TNA Wrestling, a pro-wrestling company based in Orlando and Nashville.
• Trinitroaniline
• Training Needs Analysis or training analysis
• IATA code for Jinan Yaoqiang International Airport
• New Atlantis magazine or The New Atlantis, A Journal of Technology & Society
• Aritzia, TNA, a lifestyle clothing brand
• TransAsia Airways

See also

• T & A