Mildred Loving, a black woman whose anger over being banished from Virginia for marrying a white man led to a landmark Supreme Court ruling overturning state miscegenation laws, died on May 2 at her home in Central Point, Va. She was 68.

Mr. Loving died in a car accident in 1975, and the Lovings’ son Donald died in 2000. In addition to her daughter, Peggy Fortune, who lives in Milford, Va., Mrs. Loving is survived by her son, Sidney, of Tappahannock, Va.; eight grandchildren; and 11 great-grandchildren.