White Oak Plantation, also known as the William Johnston House, is a historic plantation house located near Charlotte, Mecklenburg County, North Carolina. It was built about 1792, and is a two-story, Catawba River Valley School style brick dwelling. The original Quaker plan interior has been converted to a center hall plan. It has a gable roof overhang and a full-width, two-story gabled porch. It was built by William Johnston, a captain in the North Carolina militia at the Battle of King's Mountain in 1780.