Mary Babnik Brown (November 22, 1907 – April 14, 1991) was an American who became known for having donated her hair to the United States military during World War II.
Thirty-four inches long (86 cm), her blonde hair had never been chemically treated or heated with curling irons.Brown declined compensation for her donation, believing what she had done was her patriotic duty.
President Ronald Reagan wrote to her that year on her 80th birthday to thank her, and in 1991 she received a special achievement award from the Colorado Aviation Historical Society during a ceremony at the Air Force Academy in Colorado Springs.