Katherine is a feminine given name.
Katherine, Catherine or Katharine may also refer to:
Royalty
- Catherine of Lancaster (1373–1418), daughter of John of Gaunt and wife of Henry III of Castile
- Catherine of Portugal (nun) (1436–1463), Portuguese infanta (princess)
- Catherine the Great (1729–1796), Empress of Russia
- Catherine of Valois (1401–1437), Queen consort of England to Henry V of England
- Catherine of Aragon (1485–1536), Queen Consort of England as Henry VIII of England's first wife
- Catherine Howard (c. 1523–1542), Queen Consort of England as Henry VIII of England's fifth wife
- Catherine Parr (1512–1548), Queen Consort of England as Henry VIII of England's sixth wife
- Catherine de' Medici (1519–1589), Queen of France as the wife of King Henri II of France
- Catherine of Braganza (1638–1705), Queen Consort of King Charles II of England
- Catherine I of Russia (1684–1727), Tsarina-consort of Russia, wife of Peter the Great
- Katharine, Duchess of Kent (born 1933), wife of Prince Edward, Duke of Kent
- Princess Katherine of Greece and Denmark (1913–2007), great-granddaughter of Queen Victoria of the United Kingdom
- Katherine, Crown Princess of Yugoslavia (born 1943), wife of Alexander, Crown Prince of Serbia
- Catherine, Princess of Wales (born 1982), wife of the Prince of Wales, heir to the British throne
England
- Catherine-de-Barnes, Solihull, England. Perhaps named after Ketelberne, who owned it after the Norman Conquest.
Greece
- Katerini, Greece, named for Saint Catherine of Alexandria
Russia
- Yekaterinburg, Russia, named for St. Catherine and Empress Catherine II of Russia
- Kathy Beale, a fictional character in the British soap opera EastEnders