| Founded | 1917 |
|---|---|
| Dissolved | 1924 |
| Location | |
Members | 20,000 |
| Affiliations | Industrial Workers of the World, One Big Union |
The Lumber Workers' Industrial Union (LWIU) was a labor union in the United States and Canada which existed between 1917 and 1924. It organised workers in the timber industry and was affiliated with the Industrial Workers of the World (IWW).