R12 may refer to:

Automobiles

  • BMW R12, a motorcycle
  • Renault 12, a French family car

Aviation

  • Bell R-12, an American utility helicopter
  • Caudron R.12, a French experimental biplane
  • Republic XR-12 Rainbow, an American experimental reconnaissance aircraft
  • R-12 Kassel/Rothwesten, a former United States Army Air Corps airfield in Germany
  • Rubik R-12 Kevély, a Hungarian training glider
  • Yakovlev R-12, a Soviet prototype reconnaissance aircraft

Roads

  • R12 road (Belgium)
  • R12 road (Ghana)
  • R-12 regional road (Montenegro)
  • R12 road (Russia)

Public transport

  • R12 (New York City Subway car)
  • R12 (Rodalies de Catalunya), a regional rail line in Catalonia, Spain
  • Kenilworth Avenue Line of the Washington Metropolitan Area Transit Authority

Vessels

  • , a destroyer of the Royal Navy
  • , an aircraft carrier of the Royal Navy
  • , a submarine of the Royal Navy
  • , a submarine of the United States Navy

Other uses

  • R12 (cemetery), a Neolithic cemetery in Sudan
  • Dichlorodifluoromethane, a refrigerant
  • Ndombe language
  • R-12 Dvina, a Soviet ballistic missile
  • R12: Extremely flammable, a risk phrase
  • Small nucleolar RNA R12