Willett is a ghost town in Harding County, in the U.S. state of South Dakota. [1]
A post office called Willett was established in 1909, and remained in operation until 1952. [2] The town was named for the a local family engaged in ranching. [3]
https://southdakota.hometownlocator.com/maps/feature-map,ftc,3,fid,1263410,n,willett.cfm