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
Reggio Calabria Airport

See also
Regular (disambiguation)