Elizabeth "Betty" Washington Lewis (June 20, 1733 – March 31, 1797) was an American Colonist. She was the younger sister of George Washington and the only sister that survived childhood. Her half-sister, Jane, died at age 11 and her sister Mildred in infancy. Betty Washington was born into the Washington Family as the first daughter of Augustine Washington and Mary Ball Washington. She and her husband are commemorated with street names in the nearby Ferry Farm subdivision (Fielding Circle and Betty Lewis Drive).