Ottumwa is an unincorporated hamlet in Haakon County, in the U.S. state of South Dakota.
Only three homes and a farm are located there; no businesses or services.
[1] A post office at Ottumwa was established in 1904, and remained in operation until 1983.
[2] The community takes its name from Ottumwa, Iowa, the native home of a share of the early settlers.
This South Dakota state location article is a stub.