East Branch Oil Creek is a 10.9-mile (17.5 km)[3] 4th order tributary to Oil Creek in Crawford County, Pennsylvania.

East Branch of Oil Creek rises at the confluence of Stranahan and Patrick Runs in Clear Lake.

It then flows south and southwest through the Erie Drift Plain to Centerville, Pennsylvania where it joins Oil Creek.

East Branch Oil Creek drains 59.8 square miles (155 km2) of area, receives about 46.0 in/year of precipitation, has a topographic wetness index of 467.92, and has an average water temperature of 7.56 °C.

[4] The watershed is 49% forested.