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Indiana Counties
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Indiana Counties

Indiana is divided into ninety-two counties. The oldest and newest Counties in Indiana are Knox County (created 1790) and Newton County (created 1857).Many Indiana counties are named for the US Founding Fathers and personalities of the American Revolutionary War, the War of 1812 and Battle of Tippecanoe; early leaders of Indiana Territory and Indiana, as well as surrounding states like Michigan and Kentucky; plus Native American tribes and geographical features.

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Posey County, Indiana

Posey County Education, Geography, and HistoryPosey County, Indiana Courthouse

Posey County is a county located in the southwestern corner of the state of Indiana. As of 2010, the population was 25,910. Posey County was created on November 1, 1814. The county seat is Mount Vernon. The county is named for Thomas Posey, governor of Indiana Territory.

Posey County is part of the Evansville, IN-KY Metropolitan Statistical Area.

Etymology - Origin of Posey County Name

The county is named for Revolutionary War hero Thomas Posey who later became United States Senator from Louisiana and Indiana Territory Governor.


County QuickFacts: Census Bureau Quick Facts

Posey County History

Posey County was organized November 1, 1814.The county was named for Revolutionary War Gen. Thomas Posey, who was, at the time, Governor of the Indiana Territory

Posey County is divided into 10 Civil Townships as follows: Bethel, Black, Center, Harmony, Lynn, Marrs, Point, Robb, Robinson and Smith.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 419 square miles (1,086 km2), of which 408 square miles (1,058 km2) is land and 11 square miles (28 km2) (2.61%) is water.

Posey county is located in southwest Indiana. The lowest point in the state of Indiana is located on the Ohio River in Posey County.

Neighboring Counties

Bordering counties are as follows:

  • Northeast: Gibson County
  • East: Vanderburgh County
  • Southeast: Henderson County, Ky.
  • South: Union County, Ky.
  • Southwest: Gallatin County, Ill.
  • Northwest: White County, Ill.; Edwards County, Ill.


Mount Vernon High School - Mt. Vernon
North Posey High School - Poseyville

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