| Acronym | Definition |
|---|
| RIV | Riverside (Amtrak station code; Riverside, CA) |
| RIV | River |
| RIV | Registrar of Imported Vehicles (Transport Canada; also seen as RVI) |
| RIV | Riviera Holdings Corporation (stock symbol) |
| RIV | Rapid Intervention Vehicle(s) |
| RIV | Rallye International du Valais (French: International Rally of Valais; Switzerland) |
| RIV | Recirculation Isolation Valve |
| RIV | Radio Interference Voltage |
| RIV | Rich Interactive Video |
| RIV | Recreation Integration Victoria (Canada) |
| RIV | Rijks Instituut voor de Volksgezondheid (Dutch: National Institute for Health; now Rijksinstituut voor Volksgezondheid en Milieu) |
| RIV | Radio Science IF-to-VF Downconverter |
| RIV | Régie Immobiliére de Vienne (French: Real Estate Board of Vienna; Austria) |