| RGC | Radar Ground Clutter 
| Others |
| RGC | Rainbow Group of Companies Inc.
| Others |
| RGC | Raising God's Children
| Others |
| RGC | Rally Guanajuato Corona
| Others |
| RGC | RAND Genealogy Club
| Others |
| RGC | Ranked Gaming Client
| Others |
| RGC | Rattlesden Gliding Club
| Others |
| RGC | Reader Generated Content
| Others |
| RGC | Really Great Chinese
| Others |
| RGC | Reception and Guidance Center
| Others |
| RGC | Reception Guidance Center
| Others |
| RGC | Recurrent Graph Classifier
| Others |
| RGC | Redstar Gold Corp
| Others |
| RGC | Regeneron Genetics Center
| Others |
| RGC | Reimann and Georger Corporation
| Others |
| RGC | Remote Gas Calibrator
| Others |
| RGC | Repair Group Category
| Others |
| RGC | Research Grants Committee
| Others |
| RGC | Research Grants Council
| Others |
| RGC | Resource- Guaranteed Connection
| Others |
| RGC | Resource-Guaranteed Connection
| Others |
| RGC | Retinal Ganglion Cells
| Others |
| RGC | Retro Gaming Connexion
| Others |
| RGC | Riley Guidance Center
| Others |
| RGC | Rio Grande College
| Others |
| RGC | Roanoke Gas Company
| Others |
| RGC | Robert Gordon's College
| Others |
| RGC | Rock Guide Course
| Others |
| RGC | Rugby Gogledd Cymru
| Others |
| RGC | Rygbi Gogledd Cymru (Welsh)
| Others |