| Abbreviation | Definition |
|---|---|
| RCO | Risk Control Officer |
| RCO | Risk & Control Officer |
| RCPC | Regional Community Policing Center |
| RCPD | Redwood City Police Department |
| RCPD | Rockville City Police Department |
| RDD | Radar Detector Detector |
| RDF | Reasons, Details, or Facts |
| RDS | Rural Development Service |
| REC | Racial Equality Council |
| REP | Radio Emergency Patrol |
| REVCOM | Radio Emergency Volunteer COMmunication |
| RGP | Royal Gibraltar Police |
| RHIP | Rank Has Its Privileges |
| RHPD | Rock Hall Police Department |
| RHPD | Rock Hill Police Department |
| RI | Resolution of Identity |
| RIC | Royal Irish Constabulary (1867 to 1922) |
| RIDDOR | Reporting of Injuries, Diseases, and Dangerous Occurrences Regulations |
| RIFC | Regional Intelligence Fusion Centre |
| RIO | Rail Incident Officer |