RFA
- Federal Republic of Germany
- Radio Free Asia
- Radiofrequency ablation
- Regional Forest Agreement
- Regulatory Flexibility Act
- Renewable Fuels Agency
- Renewable Fuels Association
- Report for America
- Request for admissions
- Requests for adminship
- Restricted free agent
- Resurrection Fighting Alliance
- Ring Fit Adventure
- Rocket Factory Augsburg
- Rome Free Academy
- Royal Field Artillery
- Royal Fleet Auxiliary
- Royal Frankish Annals
- Rugby fives