Denby is an unincorporated community in Oglala Lakota County, in the U.S. state of South Dakota.[1]
A post office called Denby was established in 1922, and remained in operation until 1985.[2] The community was named for Edwin Denby, 42nd United States Secretary of the Navy.[3]
43°03′39″N 102°20′16″W / 43.06083°N 102.33778°W / 43.06083; -102.33778