The Piazza Cotton Gin is on the Frogmore Plantation at 11656 U.S. Highway 84, about 7 miles (11 km) west of Ferriday, Louisiana in Concordia Parish, Louisiana.

The building containing the cotton gin press was built c.1880, while the machinery was added c.1900.

[2] The building is estimated to have been started c.1880 based on square nails used in its construction; some of the equipment bears 1883 and 1884 patent dates.

[2] The property was listed on the National Register of Historic Places in 1999.

[1] This article about a property in Louisiana on the National Register of Historic Places is a stub.