Sandra Day O'Connor  (1930 - )
First woman appointed to the U.S. Supreme Court. Following successes as Assistant Attorney General and State Senator in Arizona, O'Connor was elected to Superior Court and then the Court of Appeals. She was named to the Supreme Court by President Ronald Regan.

Georgia O'Keeffe  (1887 - 1986)
Artist and perhaps the best-known American woman painter. An American original in both her lifestyle and painting, O'Keeffe produced works of high energy and vision throughout her long life.

Annie Oakley  (1860 - 1926)
Markswoman, was probably the nation's finest. A performer for many years with Buffalo Bill's Wild West Show, Oakley was a staunch supporter of other women's opportunities and raised funds to send needy women to college and nursing school.