RG2

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