NDA, nda, or Nda may refer to:
Military National Defence Academy (disambiguation) National Defence Act, the primary law establishing the Canadian Armed Forces National Defense Area, a military installation at the Mexico–United States border operated by the U.S. Government Naval Defence Act (disambiguation) Niger Delta Avengers, a militant group in Nigeria's Niger Delta Nigerian Defence Academy, a military academy in Nigeria National Defence Academy (India), an armed forces training academy in India Northern Domestic Airspace, a Canadian aviation organization
Politics National Data Administration, a Chinese central government agency National Democratic Alliance (disambiguation) National Democratic Assembly, the English name of the Israeli political party Balad Other organizations National Dance Alliance, a sister company of the National Cheer Association National Dance Association, a defunct association of the American Alliance for Health, Physical Education, Recreation and Dance National Dental Association, an association for African-American dentists Net Daemons Associates, a computer network and systems administration company New Dutch Academy, an orchestra in The Hague, Netherlands National Disability Authority, an agency of the Irish Department of Children, Disability and Equality Nuclear Decommissioning Authority, an entity of the UK government Notre Dame Academy (disambiguation)
Music "NDA" (song), a 2021 song by Billie Eilish "NDA", a song by Megan Thee Stallion from the album Traumazine, 2022 NDA, a 2026 album by Trippie Redd
Other uses Non-disclosure agreement, a contractual agreement not to disclose specified information National Design Awards, by the American National Design Museum New Drug Application, to the U.S. Food and Drug Administration Non-destructive analysis, to evaluate a material's properties Najran Domestic Airport, Saudi Arabia Nicolas Dupont-Aignan, a French politician Ndasa language (ISO 639-3 code: nda)
See also N'Da, a surname