This article gives an overview of liberalism and radicalism in Switzerland. It is limited to liberal and radical parties with substantial support, mainly proved by having had a representation in parliament. The sign ⇒ means a reference to another party in that scheme. For inclusion in this scheme it isn't necessary that parties labeled themselves as a liberal party.
In the nineteenth century the radicalism of Freisinn became the dominant political force in Switzerland, which remained for a long time in the twentieth century. Both the major Free Democratic Party of Switzerland (Freisinnig-Demokratische Partei der Schweiz/Parti Radical-Démocratique Suisse, member LI, ELDR) and the minor Liberal Party of Switzerland (Liberale Partei der Schweiz/Parti Libéral Suisse, member LI) were right-of-center liberal parties that merged into FDP.The Liberals (FDP.Die Liberalen/PLR.Les Libéraux-Radicaux, observer LI, member ALDE) in 2009.