The Industrial Union Bulletin was a newspaper published by the Industrial Workers of the World (IWW), a labor union.

During a 1906 split of the IWW into two groups, each claiming legitimacy as the real IWW, one group headed by former President Charles O. Sherman took possession of the union's office, and of the resources to continue publishing the organization's official newspaper, the Industrial Worker.

The other group, headed by IWW Secretary Treasurer William Trautmann, Vincent St. John, and Daniel DeLeon, head of the Socialist Labor Party, published through a different IWW publication called the Industrial Union Bulletin.

The last issue of the Industrial Union Bulletin was published March 6, 1909.

[3] A few days later, on March 18, the Industrial Worker, version II, No.