- source: Getty Thesaurus of Geographic Names
- the text in this section is copied from an article in Wikipedia
Onaka is a town in Faulk County, South Dakota, United States. The population was 15 at the 2010 census.
Onaka was founded in 1907 as a station stop on a branch line of the Minneapolis and St. Louis Railway built that year between Conde and LeBeau, South Dakota. Railway service to Onaka ended in 1940.