Posey County

Posey County is an administrative division in southwestern Indiana with Mount Vernon serving as its county seat. The area sits along the Ohio River and contains several neighborhoods and downtown districts recognized for their historical architecture.

The settlement began in 1806 under the name McFaden's Bluff and was renamed Mount Vernon in 1816 to honor George Washington's estate. The county grew into a regional administrative center with deep ties to Ohio River commerce and river transportation.

The Posey County Courthouse Square, Mount Vernon Downtown Historic District, and Welborn Historic District represent protected architectural heritage on the National Register.

The county is accessible by local roads with Mount Vernon positioned directly on the riverfront. Historic districts in the area are walkable, and visitors can explore public buildings and local facilities easily.

The Ports of Indiana facility at Mount Vernon was established in 1976 and remains the state's largest public port. It handles significant river commerce and connects the region to broader shipping routes along the Ohio River.

Location: Indiana

Inception: September 7, 1814

Capital city: Mount Vernon

Shares border with: Gibson County, Vanderburgh County, Henderson County, Union County, Gallatin County, White County

Website: http://poseycountygov.org

GPS coordinates: 38.02000,-87.86000

Latest update: December 7, 2025 19:26