Lone Elm is an unincorporated community in Cooper County, in the U.S. state of Missouri. The community is located at the intersection of Missouri routes KK and B approximately eleven miles south of Boonville.Lone Elm, MO, 7.5 Minute Topographic Quadrangle, USGS, 1952 (1986 rev.)

History A post office called Lone Elm was established in 1868, and remained in operation until 1906. The community was named for a large individual elm tree near the original town site.

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