Dillon is an unincorporated community in Phelps County, in the U.S. state of Missouri. The community is located along the BNSF railroad line between Rolla and St. James.Missouri Atlas & Gazetteer, DeLorme, 1998, First edition, pp. 46-7,
History A post office called Dillon was established in 1861, and remained in operation until 1954. The community has the name of John A. Dillon, an early citizen.
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