| Amherstburg Formation | |
| Type: | Formation |
| Age: | Middle Devonian |
| Period: | Middle Devonian |
| Region: | Michigan, Ohio, and Ontario |
| Country: | Canada and United States |
| Unitof: | Detroit River Group |
| Underlies: | Lucas Formation |
| Overlies: | Sylvania Sandstone |
The Amherstburg Formation is a geologic formation in Ontario, Canada and Michigan, United States. It preserves fossils dating back to the Devonian period.