NDA
- Balad (political party)
- Department of Children, Disability and Equality
- N'Da
- NDA (song)
- Najran Domestic Airport
- National Dance Alliance
- National Dance Association
- National Data Administration
- National Defence Academy (India)
- National Defence Academy (disambiguation)
- National Defence Act
- National Defense Area
- National Democratic Alliance (disambiguation)
- National Dental Association
- National Design Awards
- Naval Defence Act (disambiguation)
- Net Daemons Associates
- New Drug Application
- New Dutch Academy
- Nicolas Dupont-Aignan
- Niger Delta Avengers
- Nigerian Defence Academy
- Non-destructive analysis
- Non-disclosure agreement
- Northern Domestic Airspace
- Notre Dame Academy (disambiguation)
- Nuclear Decommissioning Authority
- Traumazine