The Windsor Mounds in Mississippi, USA, is a group of Native American Indian mounds located just over half a mile north of the ruins of Windsor Castle. This antebellum mansion burned down in 1890. The banks were built by the region's Native American inhabitants several centuries before the arrival of Colonel "Pedro" Bruin, one of the three territorial judges of the newly acquired Mississippi Territory, who settled in the area in the 1790s.

The Windsor Mounds consist of four mounds overlooking a tributary of Bayou Pierre, with Mound A being the largest and best preserved, standing over 30 feet in height. The other mounds range in size from three to 15 feet. Archaeologists have determined that the banks were built between the late Coles Creek Period and the Plaquemine Period, which spans from about AD 1100 to 1600.

Excavations in 1971 on Mound A revealed evidence of a Plaquemine Period occupation and a late 18th-century cellar related to Colonel Bruin's residence on top of the mound. In 2013, archaeologists returned to Windsor to investigate the other mounds. They found evidence of Plaquemine Period buildings on the summit of Mound B, as well as pottery, stone artefacts, and animal bones.

The wooden buildings on top of Mounds A and B may have been either temples or the residences of influential Native American leaders, both of which are found on platform mounds of this period. The functions of Mounds C and D remain unknown, with Mound D being damaged by cultivation and visible only as a slight rise on the landscape. Mound C is the location of a cemetery where members of the Freeland and Daniell families of Windsor Plantation are interred.

Windsor is the location of the earliest known colonial settlement in the region, with Colonel Bruin residing in a house atop Mound A and keeping a barn on one of the other mounds. The significance of Windsor's Native American, early colonial, and antebellum history led to its listing on the National Register of Historic Places in 1978.