| Acronym | Definition |
|---|
| SGN | Sign |
| SGN | Seattle Gay News (Washington) |
| SGN | Signature (mathematics; group theory) |
| SGN | San Gwann (postal locality, Malta) |
| SGN | Scotia Gas Networks (UK) |
| SGN | Sports Gaming Network |
| SGN | Smart Growth Network |
| SGN | Shotgun News |
| SGN | Size Guide Number (chemistry) |
| SGN | St. Gregory of Nyssa (church; San Francisco, CA) |
| SGN | Spiral Ganglion Neuron |
| SGN | Ho Chi Minh City, Vietnam - Tan Son Nhut (Airport Code) |
| SGN | Screen Gems Network |
| SGN | Secure Global Network |
| SGN | Seventh Generation, Inc. (former stock symbol; now delisted) |
| SGN | Samtec Global Network |
| SGN | Surgeon General of the Navy |
| SGN | Stealth Gaming Network (clan) |