| South Penn Run | |
| Name Other: | Tributary to West Branch Tunungwant Creek |
| Pushpin Map: | Pennsylvania#USA |
| Pushpin Map Caption: | Location of South Penn Run mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Pennsylvania |
| Subdivision Type3: | County |
| Subdivision Name3: | McKean |
| Length: | 1.24miles[1] |
| Discharge1 Location: | West Branch Tunungwant Creek |
| Discharge1 Avg: | 1.59cuft/s at mouth with West Branch Tunungwant Creek[2] |
| Source1: | Fuller Brook divide |
| Source1 Location: | about 4 miles northwest of Lewis Run, Pennsylvania |
| Source1 Coordinates: | 41.9072°N -78.7411°W[3] |
| Source1 Elevation: | 2080feet |
| Mouth: | West Branch Tunungwant Creek |
| Mouth Location: | about 3 miles northwest of Lewis Run, Pennsylvania |
| Mouth Coordinates: | 41.9034°N -78.7139°W |
| Mouth Elevation: | 1627feet |
| Progression: | West Branch Tunungwant Creek → Tunungwant Creek → Allegheny River → Ohio River → Mississippi River → Gulf of Mexico |
| River System: | Allegheny River |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
| Bridges: | none |
South Penn Run is a 1.24miles long first-order tributary to West Branch Tunungwant Creek.[1] This is the only stream of this name in the United States.[3]
South Penn Run rises about northwest of Lewis Run, Pennsylvania, and then flows east-southeast to meet West Branch Tunungwant Creek about northwest of Lewis Run, Pennsylvania.
South Penn Run drains of area, receives about of precipitation, and is about 69.41% forested.[2]