Workers' Union of Ireland
| Merged into | SIPTU |
|---|---|
| Founded | 15 June 1924 |
| Dissolved | 1 January 1990 |
| Headquarters | Dublin, Ireland |
| Location | |
| Members | 55,000 (1985) |
Key people | James Larkin |
| Affiliations | ICTU, Labour Party |
The Workers' Union of Ireland (WUI), later the Federated Workers' Union of Ireland, was an Irish trade union formed in 1924. In 1990, it merged with the Irish Transport and General Workers Union to form the Services, Industrial, Professional and Technical Union (SIPTU).