| RIAC | Racial Imbalance Advisory Council 
| Others |
| RIAC | Refugee and Immigrant Advisory Council
| Others |
| RIAC | Refugee and Immigrant Assistance Center
| Others |
| RIAC | Refugee Immigrant Assistance Center
| Others |
| RIAC | Regional Information and Advocacy Council
| Others |
| RIAC | Regulatory Improvements Advisory Committee
| Others |
| RIAC | Reliability Information Analysis Center
| Others |
| RIAC | Retirement Investment Advisory Committee
| Others |
| RIAC | Rhode Island Airport Corporation
| Others |
| RIAC | Rhode Island Association of Camps
| Others |
| RIAC | Risk Identification Analysis and Control
| Others |
| RIAC | Rock Island Auction Company
| Others |
| RIAC | Royal Irish Automobile Club
| Others |
| RIAC | Russian International Affairs Council
| Others |