• Socialist organizations by continent (5 C)
• Socialist organizations by country (15 C)

A

• Arab socialist organizations (6 C, 6 P)

C

• Christian socialist organizations (4 C, 40 P)
• Communist organizations (17 C, 8 P)

I

• International socialist organizations (22 C, 35 P)

L

• Libertarian socialist organizations (7 C, 22 P, 2 F)

M

• Socialist militant groups (10 C, 2 P)
• Multi-tendency organizations (10 C, 7 P)

P

• Socialist parties (15 C, 13 P)
• Popular fronts (11 C, 51 P)

S

• Social democratic organizations (7 C, 8 P)
• Socialist feminist organizations (4 C, 24 P)
• Socialist think tanks (1 C, 8 P)

W

• Workers' councils (2 C, 11 P)

A

• Aušrininkai

C

• Conference of Socialist Economists

D

• Democratic Left Front

F

• Federation of the Three Classes of Steam
• Fifth International

I

• International League of Peoples' Struggle
• List of International Union of Socialist Youth member organisations
• Iron Front

K

• Kurdistan Communities Union

L

• League of Poor Peasants

M

• Marx Memorial Library

N

• National Popular Resistance Front
• National Socialist Council of Nagaland

P

• Palestinian Youth Movement

R

• Rebel Faction (Cultural Revolution)

S

• Socialist Action (Poland)
• Socialist International Women
• Sudanese Movement of Revolutionary Committees

U

• United Front (South Africa)

V

• Vilna Group

W

• Watan Party of Afghanistan
• Women Democratic Front