Since the founding of Social Democratic Party of Finland in 1899 it has seen a steady number of splits and breakaway factions. Some of the breakaway organisations have thrived as independent parties, some have become defunct, while others have merged with the parent party or other political parties

References

{{DEFAULTSORT:Social Democratic Party (Finland) breakaway parties Political schisms Lists of political parties in Europe Finland, Social Democratic Party breakaway Finland politics-related lists Social Democratic Party of Finland