A national trade union center is a federation or confederation of trade unions in a single country. Nearly every country in the world has a national trade union center, and many have more than one. When there is more than one national center, it is often because of ideological differences—in some cases long-standing historic differences. Some countries, such as the Scandinavian, Denmark, Norway, Sweden and Finland have different centers for blue collar workers and professionals.
Among the larger national centers in the world are the American Federation of Labor-Congress of Industrial Organizations and the Change to Win Federation in the USA; the Canadian Labour Congress; the Trades Union Congress (TUC) in Britain; the Irish Congress of Trade Unions; the Australian Council of Trade Unions (ACTU); the Congress of South African Trade Unions; the Dutch FNV; the Danish, Norwegian, and Swedish LO; the German DGB; the French CGT and CFDT; the Italian CISL, CGIL and UIL; the Japan Trade Union Confederation RENGO; the Argentinian CGT and CTA; the brazilian CUT, and so on.
Many national trade union centers are now members of the International Trade Union Confederation though some belong to the World Federation of Trade Unions.