About our name:
Thomas Posey
In 1814 Posey County was named for Thomas Posey, a Revolutionary War Hero, who later became United States Senator from Louisiana and Indiana Territory Governor.
Location:
The
county seat of Posey is Mt. Vernon, the largest town with a population of 7478 (2000 census). Posey County is largely
a farming county but has an industrial past and large industry today located mainly in the area near the Ohio River.
Posey County was organized November 1, 1814.
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The first location was at Blackford, in the northeastern corner of Marrs Township, the town being named after Judge Isaac Blackford, a famous lawyer in Indiana for more than forty years.
- In 1817, it was removed to Springfield, near the town of Harmonie, where Frederick Rapp and his colony of Rappites lived.
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The legislative act of February 12, 1825 moved the County Seat to Mt. Vernon. First settled in 1803 by Andrew McFadin, the town site long ago known as McFadin's Bluff.
By 1849 Mt. Vernon contained substantial buildings for the Courthouse and public offices, two good hotels and about 200 houses with 1,000 inhabitants.