This article lists political parties in Costa Rica.
After the 2002 elections and the strong showing of the brand-new Citizens' Action Party, it was considered very likely that the old two-party system was on the verge of giving way to a multi-party system.
Several other parties have gained prominence since then, and the 2006 elections made it clear that Costa Rica is now a multi-party system.
[1] Although still a stable country, the shift toward many political parties and away from PUSC and PLN is a recent development.
[2] Various elected positions within the country, such as mayors and city council members, are held by many different national and local political parties.