This article lists political parties in Finland.
Finland has a strong multi-party system with coalition governments formed usually by the largest party. Parties who are not in government are called the opposition.
The party system has been rather stable since the foundation of the parliament (1907) and independence (1917), as parties founded then or their breakoff factions have consistently held the overwhelming majority in the parliament. The establishment of the Green League is the exception.
Under Finnish law, a political association that fulfils certain conditions may become an officially registered party. A registered party may nominate candidates in all national and local elections, and a party that is represented in parliament is entitled to a government subsidy relative to its number of seats. To qualify as a registered party, an association must have bylaws guaranteeing democratic internal organization and must be able to present 5,000 signatures from supporters who are eligible to vote. A party that fails to win a single seat in two consecutive parliamentary elections is stricken from the register but may apply again. (In contrast, a voluntary association has a requirement of 20,000 supporters and is not eligible for party subsidy.)