| Rockford Limestone | |
|---|---|
| Stratigraphic range: Mississippian | |
| Type | Formation | 
| Underlies | New Providence Shale | 
| Overlies | New Albany Shale | 
| Location | |
| Region | Illinois, Indiana, Kentucky | 
| Country | United States | 
The Rockford Limestone is a geologic formation in the US state of Indiana. It preserves fossils dating back to the Carboniferous period.