Clapper is an unincorporated community in Monroe County, in the U.S. state of Missouri. [1]
A post office called Clapper was established in 1872, and remained in operation until 1906. [2] The community has the name of Henry Clapper, a railroad promoter. [3]
39°35′24″N91°50′43″W / 39.59000°N 91.84528°W