| Abbreviation | Definition |
|---|---|
| SHOPO | State of Hawaii Organization of Police Officers |
| SHOs | Station House Officers (Pakistan) |
| SHP | State Highway Patrol |
| SHPD | Signal Hill Police Department |
| SHPD | Sleepy Hollow Police Department |
| SHPD | St Helens Police Department |
| SHRMT | Safety and Health Risk Management Team |
| SI | Sub Inspecter |
| SI | Sub Inspector |
| SI | Sub-Inspector |
| SIA | Shadow Investigation Agency |
| SID | Special Investigation Division |
| SIESO | Society of Industrial Emergency Services Officers |
| SIFS | INDIA Forensic sifsforensic |
| SIG | Street Index Gazetteer |
| SILP | Sindacato Italiano Lavoratori Polizia (Italian: Italian Police Workers' Union) |
| SIO | Senior Investigating Officer |
| SIPAG | SImula ng PAGbabago |
| SIPS | Standard Instructions and PlanS |
| SIR | Speed, Integrity, and Reliability |