Half Rock, Missouri
A post office called Half Rock was established in 1867, and remained in operation until 1900. According to tradition, the community was derisively so named on account of the quality of the coffee at a nearby store (i.e. the coffee was "half rock".)
- U.S. Geological Survey Geographic Names Information System: Half Rock, Missouri
- "Post Offices". Jim Forte Postal History. Retrieved 5 November 2016.
- "Mercer County Place Names, 1928–1945". The State Historical Society of Missouri. Archived from the original on June 24, 2016. Retrieved November 5, 2016.
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