| SSPO | Scottish Salmon Producers Organisation 
| Others |
| SSPO | Scottish Salmon Producers' Organization
| Others |
| SSPO | Seattle Summer Pops Orchestra
| Others |
| SSPO | Senior Superintendent of Post Office
| Others |
| SSPO | Sigma Survey for Police Officers
| Others |
| SSPO | Simulation Strategic Planning Office
| Others |
| SSPO | Southern Sudanese People Online
| Others |
| SSPO | Southwestern Support Personnel Organization at Southwestern Oklahoma State University
| Others |
| SSPO | Space Shuttle Program Office
| Others |
| SSPO | Space Shuttle Projects Office
| Others |
| SSPO | Special State Police Officers
| Others |
| SSPO | State Surplus Property Office
| Others |
| SSPO | Stel Salaried Pensioners Organization
| Others |
| SSPO | Strategic Simulation Planning Office
| Others |
| SSPO | Strategic Systems Program Office
| Others |
| SSPO | Student Security Patrol Officer
| Others |