| Wakamonoza | Wakamonoza | 1921 | 1 | |
| Washington Square Players, The | The Washington Square Players | 1916 – 1979 | 2 | |
| Wayne State University Theatre | Wayne State University Theatre | 2011 | 1 | |
| Wellesley College Theatre | Wellesley College Theatre | 2000 | 1 | |
| West Yorkshire Playhouse | West Yorkshire Playhouse | 1994 – 2017 | 6 | |
| Western Stage, The | The Western Stage | 2003 | 1 | |
| Westfalisches Landestheater | Westfalisches Landestheater | | | |
| White Theatre of the Dostoevsky Museum, The | The White Theatre of the Dostoevsky Museum | 2004 | 1 | |
| Whitman College | Whitman College | 2000 | 1 | |
| Wiener Festwochen | Wiener Festwochen | 1994 – 2017 | 16 | |
| Wild Iris Theatre Company | Wild Iris Theatre Company | 1992 | 3 | |
| Wilhelm Olins sällskap | Wilhelm Olins sällskap | 1919 | 1 | |
| Wilhelm Rydbergs sällskap | Wilhelm Rydbergs sällskap | 1886 | 2 | |
| Wilhelm Theater | Wilhelm Theater | 1878 | 1 | |
| William Engelbrechts Selskab | Engelbrechtska sällskapet (William Engelbrechts Selskab) | 1892 – 1894 | 9 | |
| William Petersens Selskab | William Petersens Selskab | 1893 | 11 | |
| Williamstown Theatre Festival | Williamstown Theatre Festival | 1984 – 2019 | 7 | |
| Wisconsin Dramatic Society, The | The Wisconsin Dramatic Society | 1911 | 1 | |
| Wollongong Workshop Theatre | Wollongong Workshop Theatre | 2003 | 1 | |
| Worcester State College, Department of Speech and Dramatics | Worcester State College, Department of Speech and Dramatics | 1971 | 1 | |
| World Film Services | World Film Services | 1973 | 1 | |
| World Theatre Festival Zagreb | World Theatre Festival Zagreb | 2003 | 1 | |
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