Fountain Grove is an unincorporated community in southwest Linn County, in the U.S. state of Missouri. The community is on Missouri Route W approximately five miles south of Meadville. The Fountain Grove Conservation Area lies adjacent to the community on the south and west. The Grand River flows past one mile to the south in adjacent Livingst…Fountain Grove is an unincorporated community in southwest Linn County, in the U.S. state of Missouri. The community is on Missouri Route W approximately five miles south of Meadville. The Fountain Grove Conservation Area lies adjacent to the community on the south and west. The Grand River flows past one mile to the south in adjacent Livingston County.