| Acronym | Meaning |
| SNA | Scientific and Natural Area |
| SNA | Service National Actif (French: Active Military Duty) |
| SNA | Signal National d'Alerte (French: National Warning Signal) |
| SNA | Somali National Army |
| SNA | Sous-marin Nucléaire d'Attaque (French Navy) |
| SNA | Soviet Naval Aviation |
| SNA | State Nature Area (various locations) |
| SNA | Statement of Nonavailability |
| SNA | Student Naval Aviator |
| SNA | Subsurface, Nuclear-Powered Attack (Submarine) |
| SNA | Surface Navy Association |
| SNA | Survivable Network Analysis |