| Williamsport Sandstone | |
| Type: | Formation |
| Age: | Silurian |
| Period: | Silurian |
| Prilithology: | sandstone |
| Region: | ,,, |
| Country: | United States |
| Subunits: | Cedar Creek Limestone |
| Underlies: | Wills Creek Formation |
| Overlies: | McKenzie Formation |
The Williamsport Sandstone is a sandstone geologic formation in West Virginia, Virginia, Pennsylvania, and Maryland. The formation includes the Cedar Creek Limestone member.[1] Near Cumberland, Maryland it includes the Cedar Creek Limestone member. It preserves fossils dating back to the Silurian period.