North Deer Creek is a long 2nd order tributary to French Creek in Mercer County, Pennsylvania.
North Deer Creek rises on the Conneaut Outlet divide about 1 mile northeast of Sunol, Pennsylvania in Mercer County. North Deer Creek then flows easterly to meet French Creek about 1 mile southeast of Carlton, Pennsylvania.
North Deer Creek drains of area, receives about 43.4 in/year of precipitation, has a topographic wetness index of 456.90, and has an average water temperature of 8.23 ðC. The watershed is 54% forested.