All theatres: I
| Name | Town | Year built |
|---|---|---|
| Imperial (London) | London | 1876 - 0 |
| Imperial (Walsall) | Walsall | 1869 |
| Imperial Cinema | London | |
| Institute Of Contemporary Arts (ICA) | London | 1833 |
| Intimate (High Wycombe) | High Wycombe | 1893 |
| Intimate (London) | London | 1931 |
| Inverness Court Hotel | London | 1905 |
| Islington Empire | London | 1860 - 0 |
| Islington Palace | London | 1869 - 0 |
