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)

Science and technology

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

Others

• National Rally (France) (Rassemblement national), a far-right French political party
• Royal Navy, UK
• Registered nurse, a licensed health care provider
• RN: the Memoirs of Richard Nixon, an autobiography