Femme Osage is an unincorporated community in southwest St. Charles County, in the U.S. state of Missouri.[1] The community is on Missouri Route T along the bank of the Femme Osage Creek.[2]
A post office Femme Osage was in operation from 1816 until 1933.[3] The community takes its name from nearby Femme Osage Creek.[4]
38°38′12″N 90°56′31″W / 38.63667°N 90.94194°W