Dillon is an unincorporated community in Phelps County, in the U.S. state of Missouri.
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.
Coordinates: 37°58′19″N 91°41′53″W / 37.97194°N 91.69806°W