page_title: Palmyra, Missouri
section_title: History
hierarchical_section_title: Palmyra, Missouri / History
caption_attribution_description: English: Post office mural in Palmyra, MO
context_page_description: Palmyra is a city in and the county seat of Marion County, Missouri, United States. The population was 3,595 at the 2010 census. It is part of the Hannibal Micropolitan Statistical Area.
context_section_description: Palmyra was platted in 1819, and named after Palmyra, in Syria. The settlement was designated county seat in 1827. A post office called Palmyra has been in operation since 1830.
  In 1862, the city was the scene of the Palmyra Massacre, in which ten Confederate prisoners were killed in retaliation for the disappearance of a local Union man.
  The Culbertson-Head Farmstead, Dryden-Louthan House, Gardner House, Marion County Jail and Jailor's House, Peter J. Sowers House, Speigle House, Walker-Woodward-Schaffer House, and Ephraim J. Wilson Farm Complex are listed on the National Register of Historic Places.
caption: WPA mural, Memories of Marion County by James Penny, in Palmyra post office
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