Vann Dozier of Leevy's Funeral Home in Columbia said Washington-Williams died Monday. A cause of death wasn't given.
Washington-Williams was the daughter of the one-time segregationist and his family's black maid.
There had been rumors for decades in political circles and the black community that Thurmond had fathered a daughter by a black woman. But Washington-Williams did not come forward and identify Thurmond as her father until after his death at age 100 in 2003.
Washington-Williams spent decades as a school teacher in Los Angeles. Thurmond was South Carolina's governor and for a time was the nation's longest-serving U.S. senator.
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