Southernmost regions of South America, below the Tropic of Capricorn
  • Argentina - Territory in southeast South America, ruled since 1861 by the República Argentina
  • Brazil - Territory in eastern South America, ruled since 1988 by the República Federativa do Brasil
  • Chile - Territory in southwest South America, ruled since 1980 by the República de Chile
  • Paraguay - Territory in central South America, ruled since 1992 by the República del Paraguay
  • Uruguay - Territory in southeast South America, ruled since 1828 by the República Oriental del Uruguay