Rea
- AO Rethymniaki Enosi Athliton
- Atomenergoprom
- European Research Executive Agency
- Mens rea
- REA Group
- RIA (disambiguation)
- Railway Express Agency
- Ralph Engelstad Arena
- Rea (album)
- Rea (name)
- Rea Award for the Short Story
- Rea Magnet Wire
- Rea River
- Rea, Lombardy
- Rea, Missouri
- Reactive arthritis
- Real Academia Española
- Reggio Emilia approach
- Religious Education Association
- Renewable Energy Association
- Resources, Events, Agents
- Rhea (bird)
- Rhea (disambiguation)
- Rio (disambiguation)
- River Rea
- River Rea, Shropshire
- Riya
- Rosenergoatom
- Rules Enabling Act
- Rural Electrification Act
- Rural Utilities Service
- Russia
- Ríos (disambiguation)
- Sonchus subg. Dendroseris
- Stiff ODE
- Totești