| Federal Run | |
| Name Other: | Tributary to Muddy Creek |
| Map Size: | 300 |
| Pushpin Map: | USA Pennsylvania#USA |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of Federal Run mouth |
| Pushpin Map Alt: | Map of Federal Run mouth location |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Pennsylvania |
| Subdivision Type3: | County |
| Subdivision Name3: | Crawford |
| Length: | 6.88miles[1] |
| Discharge1 Location: | Muddy Creek |
| Discharge1 Avg: | 37.14cuft/s at mouth with Muddy Creek[2] |
| Source1: | Kelley Run divide |
| Source1 Location: | pond about 0.5 miles northeast of Kings Corners, Pennsylvania |
| Source1 Coordinates: | 41.7475°N -79.9019°W[3] |
| Source1 Elevation: | 1648feet[4] |
| Mouth: | Muddy Creek |
| Mouth Location: | about 0.25 miles north-northwest of Little Cooley, Pennsylvania |
| Mouth Coordinates: | 41.8192°N -79.8944°W |
| Mouth Elevation: | 1175feet[5] |
| Progression: | generally south |
| River System: | Allegheny River |
| Tributaries Left: | Little Federal Run |
| Tributaries Right: | unnamed tributaries |
| Bridges: | King Road, Rockdale Road (x2), Forest Home Road, Brown Hill Road, Mickle Hollow Road, Athens Road, Dobbs Road (x2), S. Browns Hill Road |
Federal Run is a 6.88miles long 3rd order tributary to Muddy Creek in Crawford County, Pennsylvania. This is the only stream of this name in the United States.[3]
Federal Run rises about 0.25 miles north-northwest of Kings Corners, Pennsylvania, and then flows southerly to join Muddy Creek about 0.5 miles north-northwest of Little Cooley, Pennsylvania.[5]
Federal Run drains of area, receives about 45.6 in/year of precipitation, has a wetness index of 442.71, and is about 43% forested.[2]