| Dayton Formation | |
| Type: | Formation |
| Age: | Silurian |
| Period: | Silurian |
| Country: | United States |
| Underlies: | Osgood Shale and Rochester Shale |
| Overlies: | Brassfield Formation and Cataract Group |
| Extent: | Ohio |
The Dayton Formation is a geologic formation in Ohio. It dates back to the Silurian.