RCG may refer to:
Radio Crne Gore, a radio station in Montenegro Republic of Montenegro, state preceding independent Montenegro The Radio Church of God, now the Worldwide Church of God XHRCG-TDT, a television station in Saltillo, Mexico, branded as RCG Televisión Range concatenation grammars, a type of formal grammar Restored Church of God Revolutionary Communist Group (disambiguation), several political parties Royal Cambodian Government: see Politics of Cambodia Royal Caribbean Group, a cruise holding company Rural Connectivity Group, a joint venture between New Zealand mobile network operators Phalaris arundinacea (reed canary grass), a species of grass