Hester Ann LeFevre Harrison Bratney, 70, a former resident of Washington and Leesburg who had been active in volunteer work and patriotic organizations, died of cancer Tuesday in a hospital in Virginia Beach.

A resident of Charleston, S.C., since 1971, she was visiting relatives in Virginia Beach at the time of her death.

Mrs. Bratney was a native of Philadelphia and came to Washington in 1917. She moved to Leesburg in 1929, where she lived until moving to South Carolina.

She had been active in volunteer and fund-raising activities with the American Cancer Society, the American Red Cross, and the National Trust for Historic Preservation. She was a member of the National Society of Colonial Dames and the Daughters of the American Revolution. Mrs. Bratney's first marriage, to Gordon Luke, ended in divorce. Her second husband, Stirling M. Harrison, who was Commonwealth's attorney for Loudoun County, died in 1968. Her third husband, Bertrand H. Bratney, died in 1973.

Mrs. Bratney's survivors include two daughters by her first marriage, Hester Ann Luke Glans of Westport, Conn., and Nancy Luke Riner of Virginia Beach; two daughters by her second marriage, Sally Harrison Young of The Plains, Va., and Elizabeth Harrison Goulart of Virginia Beach; a sister, Sally Mitchell LeFevre Swain of Charleston, S.C.; 11 grandchildren, and one great-grandchild.