RG2 may refer to:
- 1983 RG2 (aka 10482 Dangrieser), a Main-belt asteroid
- a United Kingdom postcode covering the Reading area
Rg2 or rg2 may refer to :
- Ginsenoside Rg2, a bioactive molecule
- a chess move of a rook to g2
- RG-2, a starter pistol made by the Röhm Gesellschaft
RG-II may refer to :
- Rhamnogalacturonan II, a type of pectin