Hummer Creek is a long 2nd order tributary to Thompson Creek in Crawford County, Pennsylvania.
According to the Geographic Names Information System, it has also been known historically as:
Hummer Creek rises about 2 miles east-southeast of Vrooman, Pennsylvania and then flows southwest to join Thompson Creek at Shelmandine Springs.
Hummer Creek drains of area, receives about 45.1 in/year of precipitation, has a wetness index of 459.72, and is about 54% forested.