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