RRI may refer to:
- Rights and Resources Initiative, an international coalition of organizations promoting land tenure reform for poor communities around the world
- Radio Republik Indonesia, the Indonesian state radio network
- Radio Romania International
- Raman Research Institute, a physics research institute and trust
- Robarts Research Institute in London, Canada.
- Rick A. Ross Institute, an anti-cult organization
- Route relay interlocking, an electrical system used in Railway signalling
- NYSE code for Reliant Energy
- Road Routing Information within Integrated Transport Network data provided by Ordnance Survey
- RRI Rhein Ruhr International, Consulting Engineers