TNA

TNA may refer to:

Organisations

 * Tamil National Alliance, a political coalition in Sri Lanka
 * The National Alliance, a political party in Kenya
 * The National Archives (United Kingdom), a UK public body
 * Tonga Nurses' Association, a trade union
 * Trans Nation Airways, an Ethiopian charter airline

Science and technology

 * Threose nucleic acid, an artificial genetic polymer
 * 2,4,6-Trinitroaniline, a nitrated amine
 * Time and attendance, a system that monitors and records employee attendance

Sports

 * Total Nonstop Action Wrestling, American professional wrestling promotion
 * Torneo Nacional de Ascenso, former name of La Liga Argentina de Básquet, a division of the Argentine basketball league

Transport

 * TNA, IATA code for Jinan Yaoqiang International Airport, China
 * TNA, ICAO code for TransAsia Airways
 * TNA, National Rail code for Thornton Abbey railway station

Other uses

 * TNA (Airborne nuclear warhead), a French thermonuclear warhead
 * TNA, a clothing brand of Aritzia
 * tna, ISO 639 code for Tacana language
 * TNA Media, owner of The New Age
 * TNA Park, a multi-use stadium in Tarkwa, Ghana
 * Tashi Namgyal Academy, a public school in Sikkim, India
 * The New American, a print magazine
 * Training needs analysis, the process of identifying the gap between training and needs