Unions of Spain

UGT Headquarters in Madrid.

The unions in Spain are recognized in the 1978 Constitution, which states that the union is "the organization that defends the interests of workers" —according to the RAE, it is the workers' association set up to defend and promote the professional, economic or social interests of its members—. Branch unions often associate to form unions or union confederations.

The first union in the history of the labor movement in Spain was the Association of Weavers of Barcelona, legally founded in 1840 during the Regency of Espartero.

List of trade union organizations in Spain [citation needed]

• Unified Association of Civil Guards (AUGC)
• Group of Prison Institutions (ACAIP) Corps
• Reformist police group (ARP)
• Workers' Union Alternative (AST)
• National Association of Education Professionals (ANPE)
• Independent Trade Union and Officials (CSI-F)
• Unitarian Central Trailers (CUT)
• Base Commissions (co.bas)
• Worker Commissions (CC.OO.)
• Confederation of Tables and Professionals (CCP)
• Confederation of Education Workers’ Unions (STEs)
• General Confederation of Labour (CGT)
• Inter-union Confederation Galega (CIG)
• National Confederation of Labour (CNT)
• Workers' Coordinator (COS)
• Euskal Herriko Nekazarien Elkartasuna (EHNE)
• Eusko Langileen Alkartasuna-Solidarity of the Basque Workers (ELA-STV)
• Ya (EYA)
• Ezker Sindikalaren Konbergentzia (ESK)
• Independent Federation
• Gestha. Technical Union of the Ministry of Finance.
• Intersindical - Catalan Trade Union Confederation
• Intersindical Region Murciana (La Intersindical)
• Intersindical Valenciana
• Jusapol (Police Justice)
• Jupol (CNP Majority Union)
• Jucil (Majority Association of the Guardia Civil)

• Langile Abertzaleen Batzordeak (LAB)
• Organization of Sexual Workers (OTRAS)
• Aragonese Workers Union (SOA)
• Andalusian Workers Union (SAT)
• Union of railway circulation (FSC)
• CaixaBank Employees Union (SECB)
• Nursing Union (SATSE)
• Union Ferroviario-Intersindical (SF-I)
• Independent Energy Union (IES)
• Trade Union of Technical Engineers and Computer Engineers (SITIC)
• Medical Union of the Valencian Community CESM-CV
• Public Assistance Doctors Union (SIMAP)
• Union for the Defense of Solidarity with the Workers of Spain (SPDSTE - VOX)
• Workers' Union (STR)
• Union of Communications Workers (STC)
• Spanish Union of Machinists and Ferroviary Helpers. (SEMAF)
• Spanish Air Line Pilots Union (SEPLA)
• Independent Tax Agency Union (SIAT)
• Independent Union of the Valencian Community (S.I.C.V.)
• Union Labrego Galego (SLG-CC.LL.)
• General Union of Extreme Workers (SGTEX)
• Workers' Union (SOC)
• Spanish Confederation of Police (CEP)
• Unified Police Union (SUP)
• Union Union (SU)
• Union for the Defense of Solidarity with the Workers of Spain
• Workers' Solidarity (SO)
• Postal Solidarity
• We're unionists.
• Audiovisual and Cinematographic Technicians of the Spanish State (TACEE)
• Join Pagesos
• Union of Small Farmers and Livestocks (UPA)
• Union General de Trabajadores (UGT)
• National Union of Workers (UNT)
• Workers' Union (USO)
• Union of Air Controllers (USCA)

The main level I unions in Spain by number of affiliates

• 1 General Union of Workers (UGT)
• 2 Working Commissions (CCOO)
• 3 Workers' Union (USO)
• 4 Independent Trade Union and Officials (CSIF)
• 5 General Confederation of Labour (Spain) (CGT)
• 6 Eusko Langileen Alkartasuna-Solidarity of the Basque Workers (ELA, Álava, Guipúzcoa, Vizcaya, Navarra, mainly)
• Note from 3 to 5 do not agree to decide who has more membership, so the position can vary according to the source you consult, although by number of registered delegates elected in the trade union elections, USO is clearly the third trade union force. It seems position 1, 2 and 6 are clearer.