Black Walnut, MissouriBlack Walnut is an unincorporated community in St. Charles County, in the U.S. state of Missouri.[1] HistoryA post office called Black Walnut was established in 1875, and remained in operation until 1908.[2] The community was named for a grove of black walnut timber near the original town site.[3] References
38°52′24″N 90°22′16″W / 38.87333°N 90.37111°W
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