List of socialist parties with national parliamentary representation

The following is a list of political parties presently espousing a variety of socialism which have representation in national parliaments, grouped by states in which they operate. The list does not contain parties previously represented in parliaments, nor social democratic parties. 178 socialist, communist and anti-capitalist parties have been elected worldwide to parliament in 83 different recognized and non-recognized states. Of the 83 states listed here, 18 of them are republics ruled by a socialist, communist or anti-capitalist party, five of them are official socialist states ruled by a communist party; four of which espouse Marxism–Leninism (China, Cuba, Laos, and Vietnam) while the fifth (North Korea) espouses Juche.