RN

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
• Renovación Nacional 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
• Resistencia Nicaragüense, Nicaraguan Contra rebels

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 ${\textbf {R}}^{n}$ or $\mathbb {R} ^{n}$
• 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
• RN, then IATA code of Air Horizons, a former French airline
• RN, then IATA code of Rayani Air, a former Malaysian airline
• Kirundi language (ISO 639-1: RN)