| Frogmore Mound Site (16 CO 9) | |
| Map Type: | USA Louisiana |
| Coordinates: | 31.6047°N -91.6708°W |
| Location: | Ferriday, Louisiana, Concordia Parish, Louisiana,  United States |
| Region: | Concordia Parish, Louisiana |
| Built: | 1020 CE |
| Abandoned: | 1260 |
| Cultures: | Late Coles Creek culture |
| Architectural Styles: | earthwork |
| Architectural Details: | Number of monuments: 1Number of temples: 1 |
| Notes: | Responsible body: Private |
| Precolumbian: | yes |
| Frogmore (16CO9) | |
| Nearest City: | Ferriday, Louisiana |
| Added: | July 28, 2004 |
| Refnum: | 04000740 |
Frogmore Mound Site (16 CO 9) is an archaeological site of the Late Coles Creek culture in Concordia Parish, Louisiana. The site is located 7miles west of Ferriday on US 84. It was added to the National Register of Historic Places on July 28, 2004.
The site consists of a platform mound and associated village area with middens covering an area roughly 400feet by 200feet. The site originally had a walled ceremonial structure 20feet to 30feet in diameter. This structure was burned and subsequently covered with dirt. A mound, constructed in two stages very near each other chronologically, was built over top of the structure. The rectangular mound now measures 14feet in height, with the base being 160feet by 190feet, and the summit 60feet by 70feet.[1]
Excavations at the site have produced charcoal from beneath the mound that dates to 1020–1260 CE. Pottery recovered from the midden places the occupation of the site to the Late Coles Creek period.[1]
As stated in NRHP registration form:[2]