Marion County, Missouri

Marion County
Marion County courthouse in Palmyra
Location within the U.S. state of Missouri
Missouri's location within the U.S.
Coordinates: 39°49′N 91°37′W / 39.81°N 91.62°W / 39.81; -91.62
Country United States
State Missouri
FoundedDecember 23, 1826
Named afterFrancis Marion
SeatPalmyra
Largest cityHannibal
Area
  Total
444 sq mi (1,150 km2)
  Land437 sq mi (1,130 km2)
  Water7.4 sq mi (19 km2)  1.7%
Population
 (2020)
  Total
28,525
  Density64/sq mi (25/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district6th
Websitehttp://marioncountymo.com/

Marion County is a county located in the northeastern portion of Missouri. As of the 2020 census, the population was 28,525. Its county seat is Palmyra. Unique from most third-class counties in the state, Marion has two county courthouses, the second located in Hannibal. The county was organized on December 23, 1826, and named for General Francis Marion, the "Swamp Fox," who was from South Carolina and served in the American Revolutionary War. The area was known as the "Two Rivers Country" before organization. Marion County is part of the Hannibal, Missouri Micropolitan Statistical Area, which is included in the Quincy-Hannibal, IL-MO Combined Statistical Area.