Frogmore Plantation, Greek Revival plantation near Ferriday, Louisiana.

Frogmore Plantation is a privately owned cotton plantation complex near Ferriday in Concordia Parish, Louisiana. Its buildings include the Greek Revival Gillespie manor house, built around 1843, a slave row of cabins, numerous outbuildings, and a system cotton gin invented by Robert S. Munger. The main house was destroyed by fire on July 26, 2019.

Frogmore Plantation was added to the National Register of Historic Places on May 31, 1980. Its Greek Revival manor house, Gillespie, was built around 1843, and the property formerly relied on enslaved African American labor. A fire on July 26, 2019 destroyed the main house. The Piazza Cotton Gin was moved to the property and listed in January 1999, and the Frogmore Mound archeological site was listed in July 2004.

The layout and structures reveal how agricultural life was organized across the site, showing the physical separation of different spaces and functions. The preserved buildings offer insight into the daily routines of those who lived and worked here.

The site is accessible for self-guided exploration or organized tours through its buildings and grounds. Wear comfortable walking shoes since you will spend time outdoors, and be prepared for the warm and humid climate typical of Louisiana summers.

The cotton gin on site is a system gin of the type invented by Robert S. Munger, a later development than Eli Whitney's original gin; the source calls this surviving example one of the few, perhaps the only one, left. A second gin, the Piazza Cotton Gin, was moved here from another location in 1999 to keep the plantation working.