LSSR
| Acronym | Definition |
|---|---|
| LSSR | Lake Superior Scottish Regiment (Canada) |
| LSSR | Latvian Soviet Socialist Republic |
| LSSR | Lithuanian Soviet Socialist Republic |
| LSSR | Little Sioux Scout Ranch (Boy Scouts of America; Iowa) |
| LSSR | Linear Stress-Strain Relationship (elastic materials) |
| LSSR | Long-Range Secondary Surveillance Radar (Japan) |