RN

RN or Rn may stand for:

• rn (newsreader), a Usenet news client
• RN the code for County Roscommon, Ireland
• RN, the published memoirs of American President Richard Nixon
• Air Horizons's IATA code
• Fuerzas Armadas de la Resistencia Nacional, political party of El Salvador
• Province of Rimini's ISO 3166-2:IT code
• Radio National, an Australia-wide radio network broadcast by the Australian Broadcasting Corporation
• Radon (symbol Rn), a chemical element
• Regia Nave (Italian, meaning "Royal Ship"), a ship belonging to the Regia Marina
• Registered Identification Number, a number issued by the Federal Trade Commission, used on clothing tags and labels
• Registered nurse
• Renovación Nacional or National Renewal (Chile), a Chilean political party
• Resistencia Nacional of El Salvador
• Rio Grande do Norte, ISO 3166-2:BR code of the Brazilian state
• Round nose, a type of bullet
• Royal Navy of the United Kingdom
• Abbreviation for "right now".

See also

• Euclidean space with n dimensions, denoted by $\textbf{R}^n$ or $\mathbb{R}^n$
• Newline, represented as \r\n in certain operating systems