Reg

Reg or REG may refer to:
 * Reginald (disambiguation)
 * Reg or desert pavement
 * Raising for Effective Giving, a charity
 * Random event generator (parapsychology)
 * Raptor Education Group
 * Regal Entertainment Group
 * Regular language
 * .reg MS Windows registry file extension
 * Registration, such as for a motor vehicle
 * Abbreviation of regina, queen, on coins or in law
 * Reg (film), a BBC television drama
 * Reg, the robot in the children's animated TV show Rubbadubbers
 * Reg group in the C-lectin protein family
 * Richard E. Grant
 * Reg, a character from the Made in Abyss franchise
 * Regulation CPA exam

Places

 * Reg, Iran, a village in South Khorasan Province
 * Reg, Gilan, a village in Gilan Province
 * Reg District (Helmand), Afghanistan
 * Reg District (Kandahar), Afghanistan
 * Regent railway station, Melbourne
 * Reggio Calabria Airport