Map of the cantons of Switzerland, with the cantons shaded by the largest party in each cantonal parliament. Correct as of 4 december, 2018.

  Christian Democratic People's Party (CVP/PDC)
  Swiss People's Party (SVP/UDC)
  FDP.The Liberals (FDP/PLR)
  Social Democratic Party (SP/PS)
Colours are the standardised colours used on English Wikipedia.  The figures for the FDP include combining both FDP and Liberal Party contingents where they coexist (otherwise, Vaud would be SP/PS).
Suisse cantons.svg
Suisse cantons.svg: Pymouss44 / derivative work: Bastin