Marion County (Missouri)

The Marion County is a county located in the U.S. state of Missouri. In 2010, the County had 28 781 inhabitants and a population density of 25.4 inhabitants per square kilometer. The administrative headquarters ( County Seat) is Palmyra.


The County is located in northeastern Missouri and is bordered to the east by Illinois, from which it is separated by the Mississippi River. It has an area of 1150 square kilometers, of which 15 square kilometers are water surface. At the Marion County borders the following Nachbarcountys:


The Marion County was formed in 1826 from parts of the former Ralls County. It was named after Francis Marion (1732-1795), a general in the American Revolutionary War.

Demographic data

According to the census in 2010 living in Marion County 28 781 people in 11,462 households. The population density was 25.4 inhabitants per square kilometer. In the 11,462 households lived statistically 2.36 per person.

The racial the population was composed of 91.8 percent white, 4.9 percent African American, 0.2 percent Native American, 0.5 percent Asian and other ethnic groups; 2.1 percent were descended from two or more races. Regardless of ethnicity were 1.4 percent of the population are Hispanic or Latino of any race.

23.9 percent of the population were under 18 years old, 60.4 percent were between 18 and 64 and 15.7 percent were 65 years or older. 51.9 percent of the population was female.

The median income for a household was $ 38,778. The per capita income was $ 19,520. 18.0 percent of the population lived below the poverty line.

Places in Marion County


  • Hannibal1
  • Monroe City2
  • Palmyra

Unincorporated communities

  • Benbow
  • Ely
  • Emerson
  • Helton
  • Hester
  • Huiskamp
  • Marrow
  • Munger
  • Naomi
  • Nelsonville
  • North River
  • Oakwood
  • Philadelphia
  • Smileyville
  • South River
  • Taylor
  • Warren
  • West Ely
  • West Quincy
  • White Bear
  • Withers Mill
  • Woodland

1 - partially in Ralls County 2 - partially in Monroe and Ralls County


The Marion County is divided into eight townships: