Poseyville is a town in Robb Township, Posey County, in the U.S. state of Indiana.

The name was officially approved and changed by the Indiana State Legislature on December 26, 1844, but did not get recorded locally.

The history books of Posey County state the town name was changed in 1852.

[5] According to the 2010 census, Poseyville has a total area of 0.65 square miles (1.68 km2), all land.

[6] The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

[7] The town and northern half of Posey County is served by the MSD of North Posey County,[8] which currently operates four schools: The town has a lending library, the Poseyville Carnegie Public Library.

The racial makeup of the town was 98.9% White, 0.3% Native American, 0.2% Asian, and 0.6% from two or more races.

32.6% of all households were made up of individuals, and 14.9% had someone living alone who was 65 years of age or older.