RN or Rn may refer to: Places Rio Grande do Norte, Brazilian state (ISO 3166-2:BR code RN) Province of Rimini, Italy (ISO 3166-2:IT code) County Roscommon, Ireland (code) Politics National Rally (France) (Rassemblement national), a far-right French political party Resistencia Nacional, a revolutionary socialist party in El Salvador or National Renewal (Chile), a liberal conservative party in Chile Ruch Narodowy, a Polish far-right political party Fuerzas Armadas de la Resistencia Nacional, was the military arm of the National Resistance, a Salvadoran communist organization Science and technology Radon, symbol Rn, a chemical element rn (newsreader), a Usenet news client Newline, represented as \r\n in certain operating systems Euclidean space, with n dimensions, denoted by or Round nose, a type of bullet Recurrent nova, a class of repeating cataclysmic variable stars Other Royal Navy, UK Radio National, Australia Registered nurse, a licensed health care provider RN: the Memoirs of Richard Nixon, an autobiography Registered Identification Number, a US FTC code used on clothing labels Air Horizons, a former airline (IATA: RN) Kirundi language (ISO 639-1: RN)