Oak Valley, Kansas
A post office was opened at Oak Valley in 1875, and remained in operation until it was discontinued in 1954.
- "Kansas Post Offices, 1828-1961 (archived)". Kansas Historical Society. Archived from the original on October 9, 2013. Retrieved 8 June 2014.
- Blackmar, Frank Wilson (1912). Kansas: A Cyclopedia of State History, Volume 2. Standard Publishing Company. p. 379.
- "Elk County". Blue Skyways. Kansas State Library. Retrieved 9 June 2014.
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