| Semaphore Library | |
|---|---|
 Semaphore Town Hall, circa 1937 | |
| Location | 10-14 Semaphore Road Semaphore SA 5019 |
| Coordinates | 34°50′19″S 138°28′53″E / 34.838679°S 138.481337°E |
| Built | 1884 |
| Architect | Wright and Reed |
| Governing body | City of Port Adelaide Enfield |
| Type | State Heritage Place |
| Designated | 1 September 1983 |
| Reference no. | 2984 |
The Semaphore Library is a public library in Semaphore, South Australia. It was formerly the Semaphore Institute, Semaphore Town Hall, Ozone Theatre, and Semaphore Cinema, and is heritage-listed on both the state and national registers.