Magnolia Plantation, also known as the Boteler-Holder Farm, is a historic house and former slave plantation located at Knoxville, Washington County, Maryland, United States.

It is a 2-story, five-bay-wide house built about 1835, with a 1+1⁄2-story three-bay rear addition, set on finely coursed local fieldstone foundations.

Also on the property are several modern outbuildings and a barn, and nearby is a private cemetery with a number of grave markers bearing the name Boteler.

[2] The Magnolia Plantation was listed on the National Register of Historic Places in 1975.

This article about a Registered Historic Place in Washington County, Maryland is a stub.