The All-Canadian Congress of Labour (ACCL) was a Canadian national labour confederation, which existed from 1926 to 1940.

It was founded in 1926 as a rival to the Trades and Labour Congress

Trades and Labour Congress of Canada

The Trades and Labour Congress of Canada was a Canada-wide central federation of trade unions from 1883 to 1956. It was founded at the initiative of the Toronto Trades and Labour Council and the Knights of Labor...

. It was headed by Aaron Roland Mosher. It included remnants of the One Big Union

One Big Union (Canada)

The One Big Union was a Canadian syndicalist trade union active primarily in the Western part of the country. It was formally founded in Calgary on June 4, 1919 but lost most members by 1922. It finally merged into the Canadian Labour Congress in 1956.-Background:Towards the end of World War I, a...

 and had over 40,000 members. The ACCL was opposed to American interference in the Canadian labour movement. In 1929, the communist unions left the ACCL and formed the Workers' Unity League

Workers' Unity League

The Workers' Unity League was created in 1929 as a labour central operated by the Communist Party of Canada on the instructions of the Communist International....

. In 1940, the ACCL merged with Canadian sections of the Congress of Industrial Organizations

Congress of Industrial Organizations

The Congress of Industrial Organizations, or CIO, proposed by John L. Lewis in 1932, was a federation of unions that organized workers in industrial unions in the United States and Canada from 1935 to 1955. The Taft-Hartley Act of 1947 required union leaders to swear that they were not...

 to form the Canadian Congress of Labour

Canadian Congress of Labour

The Canadian Congress of Labour was founded in 1940 and merged with Trades and Labour Congress of Canada to form the Canadian Labour Congress in 1956.-Founding:...

.