Era was originally called Palestine, and under the latter name was laid out in 1829. A post office called Palestine was established in 1833, the name was changed to Era in 1899, and the post office closed in 1913.
- U.S. Geological Survey Geographic Names Information System: Era, Ohio
- Van Cleaf, Aaron R. (1906). History of Pickaway County, Ohio, and Representative Citizens. Unigraphic. p. 110.
- "Pickaway County". Jim Forte Postal History. Archived from the original on 4 March 2016. Retrieved 28 December 2015.
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