The Norwegian Confederation of Trade Unions (, LO) is a national trade union center, decidedly the largest and probably the most influential umbrella organization of labour unions in Norway. The 21 national unions affiliated to the LO have almost 1,000,000 members of a Norwegian population of 5 million. The majority of affiliated unions organizes traditional blue collar workers, but the largest affiliate is the Norwegian Union of Municipal and General Employees which makes up more than a third of all members. LO is affiliated to the ITUC and the ETUC. It was named the Workers' National Trade Union (, AFL) from 1899 to 1957. Affiliated with the Labour Party throughout its history, several of LO's member unions have concurrently been member bodies in the Labour Party. The organization owns the Norwegian Labour Movement Archives and Library.

Affiliates

Current affiliates

Former affiliates