| Delaware Limestone | |
| Type: | Formation |
| Age: | Devonian |
| Period: | Devonian |
| Country: | United States |
| Underlies: | Olentangy Shale and Plum Brook Shale |
| Overlies: | Columbus Limestone |
| Extent: | Ohio |
The Delaware Limestone is a geologic formation in Ohio. It dates back to the Devonian.