West Branch French Creek is a 28.69 mi (46.17 km) long tributary to French Creek that rises in Chautauqua County, New York and flows into Erie County, Pennsylvania.

It is classed as a 2nd order stream on the EPA waters geoviewer site.

[3] West Branch French Creek rises in the Town of Mina, New York in western Chautauqua County and flows southwest into Erie County, Pennsylvania and then turns south towards Wattsburg, Pennsylvania.

West Branch French Creek drains 77.89 square miles (201.7 km2) of Erie Drift Plain (glacial geology).

The watershed receives an average of 46.8 in/year of precipitation and has a wetness index of 474.55.