RI or Ri may refer to:
Richard Milhous Nixon (January 9, 1913 – April 22, 1994) was an American politician who served as the 37th President of the United States from 1969 until 1974, when he became the only U.S.
Robyn Rihanna Fenty (/riˈænə/; born February 20, 1988) is a Barbadian singer, songwriter, and actress.
Richard III (2 October 1452 – 22 August 1485) was King of England from 1483 until his death in 1485, at the age of 32, in the Battle of Bosworth Field.
Rio de Janeiro (/ˈriːoʊ di ʒəˈnɛəroʊ, -deɪ ʒə-, -də dʒə-/; Portuguese pronunciation: [ˈʁi.u d(ʒi) ʒɐˈnejɾu]; River of January), or simply Rio, is the second-most populous municipality in Brazil and the sixth-most populous in the Americas.
Richard I (8 September 1157 – 6 April 1199) was King of England from 6 July 1189 until his death. He also ruled as Duke of Normandy, Aquitaine and Gascony, Lord of Cyprus, Count of Poitiers, Anjou, Maine, and Nantes, and Overlord of Brittany at various times during the same period.
Richard Phillips Feynman (/ˈfaɪnmən/; May 11, 1918 – February 15, 1988) was an American theoretical physicist known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, and the physics of the superfluidity of supercooled liquid helium, as well as in particle physics for which he proposed the parton model.
Richard Starkey, MBE (born 7 July 1940), known professionally as Ringo Starr, is an English musician, singer, songwriter and actor who gained worldwide fame as the drummer for the Beatles.