Republican can refer to:

• Advocates of a republic, a form of government that is not a monarchy or dictatorship, and is generally associated with the rule of law
  • Republicanism, the ideology in support of republics or against monarchy; the opposite of monarchism
    • Republicanism in Australia
    • Republicanism in Canada
    • Republicanism in New Zealand
    • Republicanism in the United Kingdom
  • Classical republicanism, republicanism as formulated in Greece and Rome in antiquity
• A member of a Republican Party:
  • List of Republican Parties, a complete listing
  • Republican Party (United States), the largest conservative party in the U.S.
  • Fianna Fáil, a centrist Irish party also known as the Republican Party
  • List of Republican People's Parties, a complete listing
• Institutions or supporters of particular governments that called themselves republics, including:
  • List of republics, a complete listing
  • Roman Republic, as well as supporters of the Republic during the Roman Empire
  • Second Spanish Republic, during the Spanish Civil War
  • Various French Republics, most notably the First Republic established during the French Revolution
  • Irish republicanism, a faction in the Irish independence movement supportive of a complete break with the United Kingdom
• Republican River, a river in Colorado, Nebraska, and Kansas in the United States
• The Republican (Springfield), a newspaper published in Springfield, Massachusetts

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