Arnett is an unincorporated community in White River Township, Washington County, Arkansas, United States. It is located on Arkansas Highway 74.
A post office called Arnett was established in 1883, and remained in operation until 1951. The community has the name of its first postmaster, Luke Arnett.
Arnett's coordinates are:35ð53â²42â³N 94ð02â²23â³W[1], while the average elevation of the place is 444 meters (1457 feet).